Larry, thank you. Im self taught as i go along. For cleaning I was using hydro fluoride,(?) hydrochloric acid, and another that made a dangerous cocktail for cleaning. I stopped using the chemical. I wash the cast aluminum, media blast , then outgass, then use wax and degreaser product. I then shine the sections I want. Mask off sections, them wipe the area im going to powder coat with “ Final wipe.”
Seems like there are silicone chemicals I can try.
Thank you for direction
Bob