Nope - veneering over (or without) vinyl isn't on my "to do" list (now or ever). So far, I've tried (inconspicuous patches on the back) both a vinyl floor polish and an auto detailing (Turtle Wax) product. My results were as yours - went on fine, but no appreciable change to gloss of the vinyl. Next, I'll get a polyurethane and apply to a tiny patch on the bottom of a speaker. Even if it wrinkles the vinyl, no harm done...

My best estimate at this time is that if I want a piano finish, I need to trade in again & get the real wood (sigh).

My opinion is worth exactly what you're paying for it!