For future readers, another option might be to try a heat gun. I don't mean a gas burner, just a hot-air blower used to shrink heatshrink. This will soften the paint and you can scrape it off.
Have a couple of scrapers handy too - ideally you'd have a flat edge like a paint scraper, and one with some curves like a putty knife. The edges should be rounded over and not sharp at all. You can even make use of old cutlery, spoons and table knifes could be perfect. Forks are of no use.
Razor blades are more likely to cut into the paint underneath. A brass briscled brush might be good to get into corners and weld areas.
Last resort you may be able to get some results using a domestic hairdryer, but they tend to blow more air through to minimise the risk of burning someone's scalp or singing hair.