Try lighter fluid. I discovered by mistake (don't ask how) yesterday that lighter fluid does a very good job of removing paint., perhaps even better than Castrol. I have been using Castrol recently and it does a pretty good job but the fumes were starting to get to me. One benefit of using lighter fluid is that there is very little, if any, odor and it works almost immediately. Hope this helps you.
BTW I just used a q-tip moistened with lighter fluid and rubbed away.