Here's where a good relationship with a machine shop works to your advantage. You can take parts to them for cleaning, refinishing, and advice. Hernandez hot-tanked our block and cylinder heads, and glass-beaded and put a fresh 45-degree cut on our valves. He also inspected our cylinders for scratches and discoloration. Since everything looked good, we just needed to hone the cylinders rather than bore them out. Hernandez also Magnafluxed the block and heads for us.