Remove Hedman paint?

I bought a set of Hedmans, not realizing (until I read on this board) and then reading a tiny note they threw in --THEY DON'T PAINT their headers with hi temp paint!!! (It's only for rust.) So if you want hi temp you have to remove the factory junk.

So I have a gallon of acetone, figure that for sure. I've used about 1/2 gallon of that stuff, and all it did was make a sticky mess

WHAT chemical (don't have a blaster, really) will take this crap off?