Be careful with anything that is a known "Degreaser" as vinyl is a petroleum product that needs its "Grease" intact.

I use Spray-Nine and it seems to have no negative long-term effects.

Some strong cleaners cause stitching to rot after a time.

I surveyed a Sunseeker once that someone had used a much too harsh cleaner and the damage was extensive to the cockpit vinyl. It was clean, but useless!

BIOKLEEN works great!

3-M product that you can pick at any Walmart that works great is called "Black Streak Remover" about 8 bucks a bottle but removes the bad stuff with out harm.

Thats what I did And thats why we use Fantastic.

Ed, I've heard people complain that Knight's Marine Spray-Nine is corrosive to stitching. Today's threads are synthetics for the most part, so I have no concern about ill effects. I have used it exclusively on six boats over the years with NO ill effects whatsoever on any surface, and it has never failed to clean. If I use alot of spray nine on a particular problem, I wipe after with a chamois wet with FW. I also treat occasionally with 303 as recommended by most marine vinyl manufacturers.

I have also found that my GF's a** and breasts covered in Hawian Tropic, applied liberally to the cockpit vinyl are an effective treatment.

good stuff

I agree with rippem. This is a great way to condition the vinyl.