Lacquer thinner. Soak a piece of paper towel in lacquer thinner and place it over the melted plasic. Let it sit for a few minutes and then rub it until the plastic is gone.
And a little water. The steel wool is softer than the chrome, and the soap combined with water gives some lubrication. Works every time - just don't use too much pressure and make sure the pipes are cold (unless you just enjoy burning your fingers)
I have had good luck with just getting the pipe good and hot and then taking a rag (while wearing a glove) and wipe the junk back off. Usually take a bit of riding to get it hot enough....been know to cross two state lines in order to get the thing warm enough....
i melted my frogg togs on my bike once, and the only thing i had available to me on the road was some turtle wax bug and tar remover. since i didn't have anything else, i tried it, and lo and behold, it actually worked. if all else fails, you could try this. worked for me.