If it's Proflex caulk, white (camping) gas is supposed to work well. So I tried it last year and it just didn't work well at all. I noticed it also softens the vinyl graphics (where under the caulk) which is def. NOT good.
The 3M caulk remover works better than white gas? The 3M "cleaner" says it's says for silicone tho? Put it on first to soften the caulk then scrape? Does it damage any plastic or metal trim? From now on I'm only going to remove the old caulk if absolutely necessary and just re-caulk over the old. I have to re-caulk all around one fender because the caulk has separated due to flexing of the fender and should remove all of the old caulk. I'd hate to damage the finish or decals.