I was washing my Forest River 2401WS MBS this morning and came across a couple spots of tar acquired on our recent trip to British Columbia. As I started to reach for the asphalt/tar remover in my garage I had a flashback to age 10 when I came home after playing with excess asphalt found near a newly paved road. My mom prescribed butter as a cleaner and I remembered how well it worked.
So I tried a bit on a paper towel and turns out mom was right on. No awful chemicals, just butter rubbed on the tar/asphalt followed by a wipe of soap and a rinse and all was well. It also worked on a wax mess I created when I dropped an unlit candle that still had melted wax in the pot. A dab of butter on a paper towel followed by a soapy rag took it all off.
Don't ask if it was salted or unsalted. I don't recall.