This method is a little quicker than using chemical stripper, but it leaves your garage (or warehome) full of paint dust. It also gouges the metal underneath the paint (as shown in this picture). Avoid doing this. Gouges in your car’s sheetmetal can show through the paint unless you spray on a lot of filler primer and block-sand all the imperfections away. Bigger scratches and gouges may even need to be filled with Bondo.