Clean it as good as you can with alcohol & (if still have light markings) then set in direct sunlight for a couple of days!!

XT....Is this ok to use on the colored vinyl? (yellow) Thanks for all the input!!

I would first try rubbing alcohol. If that doesn't work, use paint thinner. It works great on white but I would color test in an inconspicous area first. Be sure and rinse thoroughly and apply a protectant when finished.

Yes, it is fine to use on the yellow vinyl. Believe me I did more damage one time using acetone to remove some heel marks when wy wife had a little to many to drink. It removed the stain, but it also remove the stain gaurd and the spots I cleaned always held the dirt more, and was harder to clean. The Omnova vinyl that we switched to in 2008 had the best stain gaurd called "Prefixx" that we ever tested, but that was a short model year.

XT

the sun will take care of it....3 weeks max! i had a huge gear oil stain from a boat above me when i was in rack storage.... they had a pro come out....no luck.....the marina got me a new sun pad, but 3 weeks later....like it was never there...trust me the sun will do magic