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Paint Polishing Guide - How To Make Good Paint Great

Cut It, Sand It, Buff It, Polish It

Paint Polishing Guide
Plan to spend some time rubbing out that spectacular paint job. At least you won't have to spend a ton of money-just lots of time.
Paint Polishing Guide
Plan to spend some time rubbing out that spectacular paint job. At least you won't have to

This is the scary time. You've just spent weeks, perhaps months, prepping the body for paint, laid on that expensive, two-stage paint with the color followed by the clearcoat, and now it's time to even it out and really make it shine. When done correctly, the results can make the paint job look spectacular. But the path to a show-winning finish is fraught with danger and potential damage if a hack takes a stab at cutting paint without the proper knowledge, technique, and equipment. The good news is that it doesn't require thousands of dollars in tools. Mainly it takes a few sheets of wet/dry sandpaper, a variable-speed polisher, loads of patience, and a soft touch. Load up on the patience part, and you'll probably do fine.

Since we know better than to think we know something about rubbing out a good paint job, we jousted with the freeway crowds and pushed our way down to our painter pal Pete Santini's shop in Westminster, California, where he turned us loose with his expert polisher, Raoul Regino. If you're new to this and would like to try your hand at rubbing out a new paint job, take your first shot at something less valuable, like a junkyard fender or a hood that must be repainted, before you attack that brand-new paint job.

Paint Polishing Guide
Color-sanding a factory clearcoat is not recommended. In this case, Santini has just repainted the hood on this Corvette, which gives him the luxury of several layers of clear to work on.
Paint Polishing Guide
Color-sanding a factory clearcoat is not recommended. In this case, Santini has just repai

Paint Plans
Everyone knows the quality of a paint job is really the effort put into it before the paint goes on, but how much paint (or more accurately, clearcoat) you lay down is also important. Santini says with today's in-vogue two-stage paint jobs, the key to quality is to lay down plenty of material. If the job calls for nothing short of the best, Santini usually sprays four to six coats of clear or even more compared with two to three coats for a production version.

If your search for the ultimate paint job leads you to a Grand National Roadster Show-winning effort, Santini claims the masters will go so far as to cut and rub then spray additional coats of clear that are further cut and polished. This takes weeks, if not months, to accomplish. On the opposite side of this insanity is a factory paint job that is applied with the fewest number of coats of clear possible. The danger, says Santini, is sanding these paint jobs and removing one or more of those precious few layers of paint. While the initial effort may look great, the image will be fleeting when the remaining clear begins to fail.

The idea here is to plan your paint job in advance, and if you can afford to lay on additional coats of clear, you have a better chance of coming up with a good-looking paint job.

Tools And Materials
Description PN Source Price
DeWalt grinder/polisher DW849 maxtools.com $189.00
3M 1200 grit wet/dry, 10 ct. 32022 3M.com $7.95
3M 1500 grit wet/dry, 10 ct. 32023 3M.com $7.95
3M 2000 grit wet/dry, 10 ct. 32044 3M.com $7.95
3M SuperBuff 9" wool pad 5701 autobodystore $22.40
3M Pad adapter 5710 autobodystore $5.50
3M Wool pad, 3 85078 autobodystore $5.50
Sure Finish black foam pad N/A autobodystore $14.80
3M Perfect-It Fine, 16 oz. 39002 properautocare $10.95
3M Perfect-It Polish, 16 oz. 39009 properautocare $11.95
Meguiar's No 3, 16 oz. 0316 properautocare $9.95
Meguiar's No 7, 16 oz. 0716 properautocare $8.95
Dragon-Fiber micro-fiber VIP-BUFN properautocare $7.95

Tools for the Trade
The most expensive part of cutting and rubbing paint is your time. Except for one power tool, such as a DeWalt variable-speed polisher, everything else is exceedingly affordable. Santini likes to make his own custom hand-rubbing blocks for radius work and for tight areas. Another important tool is standard wet/dry sandpaper ranging from 800 grit to 2,000 grit. Santini suggests soaking the paper overnight to make it more pliable. As for the polishing, start with a wool pad and work out the big scratches before moving to a softer foam pad for the final steps to completion. There are probably a dozen companies that make liquid rubbing and polishing compounds. If you don't have a favorite, start with the name companies like 3M, Meguiar's, or Mothers until you find one you prefer.

  • Paint Polishing Guide
    These are some of the tools you'll need to start a polishing project. The DeWalt polisher is a variable-speed unit. Santini recommends running the polisher at around 1,000 rpm.
    Paint Polishing Guide
    These are some of the tools you'll need to start a polishing project. The DeWalt polisher
  • Paint Polishing Guide
    Raoul uses round tubing wrapped with wet/dry sandpaper to get into radius areas like the transition of a hoodscoop. He also uses foam packing material like the triangle foam shipping edges used to protect a hood during shipping.
    Paint Polishing Guide
    Raoul uses round tubing wrapped with wet/dry sandpaper to get into radius areas like the t
  • Paint Polishing Guide
    In the final stages of polishing, tight areas might require a smaller pad, so Santini will fit a right-angle air drill with a smaller pad. Reduce the speed of the gun by reducing air pressure.
    Paint Polishing Guide
    In the final stages of polishing, tight areas might require a smaller pad, so Santini will
  • Paint Polishing Guide
    Chemicals like 3M rubbing compound, Meguiar's, or Mothers can be used for the final buffing. Santini likes to use this System One product that uses the same polishing compound with two different pads to obtain a great final surface. Start with a wool pad and finish with a soft foam pad.
    Paint Polishing Guide
    Chemicals like 3M rubbing compound, Meguiar's, or Mothers can be used for the final buffin

The Art of Sanding
If you're like us, you may never have tried color sanding. In this case, the first step is to work indoors on a cool surface under bright, fluorescent lights. "Daylight hides scratches that will show up huge under fluorescent lights," Santini says. Use the long, straight lines of the reflected light bulbs to help find imperfections. He also recommends first thoroughly cleaning the area to be sanded. Concentrate on a small area about 2 by 4 feet, such as roughly half the area of a hood. If necessary, use masking tape on all the hard edges around hoods and fenders to prevent burning the paint. It's also essential to apply a very soft touch. Let the paper do the work, and avoid digging the sanding block into the paint. Instead, apply light pressure using the entire surface of the sanding block. Be extra careful not to cut troughs or wide grooves in the paint. Always sand with the block at a slight angle to straight ahead.

  • Paint Polishing Guide
    If the paint is heavily orange-peeled, start with 800 grit. Otherwise, use 1,000-grit paper with lots of water. Raoul uses a clean bucket and a big sponge to keep the area wet. If using bare hands, keep your hand flat against the painted surface. Always sand "with the grain," in this case lengthwise along the hood.
    Paint Polishing Guide
    If the paint is heavily orange-peeled, start with 800 grit. Otherwise, use 1,000-grit pape
  • Paint Polishing Guide
    Before you get too deep in this, use a soft squeegee, then a clean soft cotton towel to dry the surface and inspect your work. Look for an even texture shiny spots will need extra attention.
    Paint Polishing Guide
    Before you get too deep in this, use a soft squeegee, then a clean soft cotton towel to dr
  • Paint Polishing Guide
    Remember to work slowly, repeating the process of cleaning the surface, wet sanding up to the 2,000 grit, and drying to inspect the work surface.
    Paint Polishing Guide
    Remember to work slowly, repeating the process of cleaning the surface, wet sanding up to

Polish to Perfection
This is where the low-speed polishing pad comes in to gently level out the 2,000-grit scratches into a highly reflective surface. Raoul starts with a wool pad using 3M Rubbing Compound to attack the scratches. With the big scratches gone, he goes back over the same surface with a less-abrasive rubbing compound and a foam pad. Keep the polisher at low speeds using the variable-speed control on the machine. Low speed avoids putting heat into the paint. Never attempt to polish paint that has been in direct sunlight.

Raoul did all the work on this '68 Camaro hood, stopping only for quick photos. The effort for half the hood took a solid two hours, which means it would take three to four hours to cut and polish the entire hood. This is not a job that can be rushed, so plan on spending several days to cut and polish a new paint job. It's all in how you even out the scratches.

  • Paint Polishing Guide
    Place a small amount of compound on the paint and spin the pad very slowly to apply the material. Otherwise, you'll end up wearing the compound on your shirt. Also note how Raoul holds the polisher at an angle. The machine spins clockwise, so he holds the polisher up and at an angle to the right to prevent the pad from digging into the paint.
    Paint Polishing Guide
    Place a small amount of compound on the paint and spin the pad very slowly to apply the ma
  • Paint Polishing Guide
    When polishing edges, position the polisher to run from the inside out past the edge. Do not polish into edges as this will burn the paint. Note here how the hood is raised slightly above the fender line to prevent digging into the fender.
    Paint Polishing Guide
    When polishing edges, position the polisher to run from the inside out past the edge. Do n
  • Paint Polishing Guide
    If you hold the polisher carefully, you can turn it 90 degrees to polish vertical surfaces. Be sure not to apply undue pressure to the horizontal work surface.
    Paint Polishing Guide
    If you hold the polisher carefully, you can turn it 90 degrees to polish vertical surfaces
  • Paint Polishing Guide
    This is a simple point, but note how Raoul places the cord over his shoulder to prevent it from banging against the fender.
    Paint Polishing Guide
    This is a simple point, but note how Raoul places the cord over his shoulder to prevent it
  • Paint Polishing Guide
    Work slowly, cleaning and drying the surface often to inspect your progress. You may have to go over one area several times to remov all the visible scratches, using a black foam pad with polishing compound. Foam pads are more porous than wool, allowing more heat to escape.
    Paint Polishing Guide
    Work slowly, cleaning and drying the surface often to inspect your progress. You may have
  • Paint Polishing Guide
    When you think you've arrived at a smooth surface, you can then hand polish the surface with a glaze like Meguiar's Show Car Glaze Number 7 and a microfiber towel. It's difficult to see in these pictures, but the difference to the passenger side of the hood will bring a smile to your face when the work is complete.
    Paint Polishing Guide
    When you think you've arrived at a smooth surface, you can then hand polish the surface wi

When to Sand
Santini has been painting since he was about 10 years old and as a professional since 1977, so he knows a few things about paint. He says some clears cut and polish easier than others. Some paints catalyze very quickly while others take more time. There are also windows during the curing process when it is very easy to cut and polish. Later, the paint will become very hard and difficult to work. The key is to know when to cut and when to lay off.

He also mentions that it's possible to do a great cut and polish job only to have the clearcoat shrink after it has cured. This will require an additional light sand and polish to bring back that ultimate finish. All these critical time factors are determined specifically by the paint manufacturer, which can supply a schedule of when the paint can safely be sanded and polished.

SOURCES
3MMeguiar's
St. Paul, MNIrvine, CA
877/ 666-2277949/752-8000
3m.com/automotivemeguiars.com
  
Auto Body StoreMothers Polish Co
Southampton, NJHuntington Beach, CA
888/485-5008714/891-3364
autobodystore.commothers.com
  
Classic Motoring AccessoriesSantini's Paint & Body Werkes
Tampa, FLWestminster, CA
800/628-7596714/891-8895
properautocare.comsantiniusa.com
  
Max ToolsSystem One Products
San Dimas, CA714/533-0802
800/629-3325systemoneproducts.com
maxtools.com 
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