If this is the product you mean,,
Then it shouldn't be a problem removing it because there shouldn't be anything to remove.
"Polishs" work by using super fine abrasive to remove texture in the paint, making it shinier. There shouldn't be anything in that to stop the paint from sticking properly unless you waxed it also.
"POLISH" is NOT a coating like wax is and after it's wiped off there shouldn't be anything on the surface but paint.
BUT, all you need to do is go over the body with some fine sandpaper, 800 or 1000 grit, to give the new paint some extra "bite" just to make sure . Personally, I'd strip it first too though.