Re: how to take off pin stripes?
If the Easy-Off isn't working -- try denatured alcohol (any normal hardware store, may also be called Methylated Spirits).
Most of the wet-brush stuff is acrylic so ... that why either the Easy-Off or Denatured Alcohol should work.
If you're getting and fade with the Easy-Off, I'd stay with it and offer several applications (as Clinton posted); it can take quite a few for heavy wet-brush work.
'01 XLT Ext Cab 4-dr / 4.0 / 5R55e / 265-75x16 / K&N FPIK / & many unknowns