You might try one of the citrus based hand cleaner/brush cleaners. I once used it to clean up some paint spatters on an acrylic hatch
top. I put it on the spatters with a small brush, thick. Then turned a bowl upside down as a cover for a few hours. It washed off with water
, taking the paint with it. No effect on the acrylic
. But try a little inconspicuous spot first.