Most of the The Harley parts got chrome plated. hot Electro acid wash. Di water wash. DI water rinse Nickel then chrome etc. It removed oil. polishing compound residue, everything A few pieces were powder coated. At home i take the Little pieces and wipe with thinner then spray can until I can do them right and spray enough parts to make it worth while get out the paint gun. just the fumes from certain solvents can cause paint problems. At the Ford factory they used a street sweeper inside the building to clean the forklift aisles. On day one of the operators added some solvent to the soap and water. the fumes traveled to the air intakes for the paind booth and about 20 new cars had a wrinkle finish.