Depending on the base material (substrate), we will carefully clean off any pre-existing powder coated or painted surface by chemical stripping or utilizing sandblast media ranging from mild to aggressive granulations, or using glass beads for other color effects. During this process, all rust and metal corrosion is removed so that when your piece is finished, it is better than brand new!
If the part you bring to us is already powder coated, we will take every step to avoid
sandblasting to remove the existing finish, and instead suggest that the piece be chemically stripped of the coating.
The reason for this is that if the piece was properly prepared and sandblasted the first time it was powder coated, the coating should be so difficult to remove that your part could potentially be ruined in the removal process. Properly applied powder coating finishes SHOULD NOT be able to be sandblasted off easily!