Tutorials

Four rules for cleaning a spray gun, from the gun makers' own manuals (DeVilbiss and 3M): 1. Take the cap, tip and needle off, and never put the gun body in solvent: DeVilbiss says it's hard on the packings and the lube. 2. Air cap holes get a brush or a toothpick, never a wire: 3M says a scratch can distort the spray pattern. 3. Flush the paint passage with gun cleaner (3M 26689 in the video). 4. After every cleaning, a drop of gun lube on the trigger stud, the air valve stem and the needle where it enters the packing.

Both bridge a rust hole. Mat for strength, cloth for a smoother finish, the same resin on either (3M, USC, Evercoat, from their data sheets). The whole lay-up, step by step, is the full video on this channel: "Fiberglass Resin, Mat and Cloth: How to Fix a Rust Hole".

A key scratch on a Honda door tells its side of the story. The car scratch repair it never saw coming: touch-up paint mixed to the car's own code, Rallye Red R-513.