Tough question.
Here's what the online West Marine advisor says about VC-17:Thin Film Teflon PaintsTeflon additive creates an extremely low friction surface. The "thinness" of the film and the aggressive solvents allow these paints to dry quickly so multiple coats can be applied in the same day. ProsHard, smooth surface with excellent durability. Can be burnished to create an extremely low-friction hull surface. Very fast drying; no thick build-up to remove when recoating. ConsIncompatible with most other types of finishes. Because of film thinness, frequent recoating may be required. Gradually loses effectiveness out of water. The "incompatible" is the problem. Can you find a primer that will go over whatever you have? Don't know. You might try calling West Marine at 1-800-BOATING. I couldn't find a phone number for the company, EXTENSOR, that makes VC-17. Good luck.