My dad was a house painter in the summer (geometry teacher during the school year) and he valued 'pre paint preparation' almost as highly as a good painting job. My wife is a retired 3M employee, so we stockpile all of their products and use them extensively! Blue painter tape and the 3M Super 77 spray adhesive are a couple of my go-to products whenever I'm in the midst of a bike build. @ClarenceB , you are right about the moving parts / joints on those springer forks. They need to free of paint or lightly coated so as not to bind. The one thing about the powder coat is the thickness of the application can change the tolerance between the moving parts.