There are products marketed as such, but they suck. They're inefficient. And, unless the situation is ideal for them, they're ineffective to some degree. Don't waste your money.
There are some products on the market that are toxic, but not long-term. i.e. just one that I can think of is a sodium hydroxide based paste. You put it on with a putty knife, put some special paper over it, and after 24 hours, you just peel the paper away - it takes away the hardened paste & paint. As the compound is very basic, then you have to treat the wood surface with something like vinegar to neutralize any remaining base. I used it once in the past; it worked incredibly well for finely detailed work with a lot of moldings that couldn't be done with a heat gun and paint scraper. While sodium hydroxide is pretty nasty stuff, it's incredibly simple to neutralize it. Hell, if you wanted to play chemist, you could mix sodium hydroxide together with hydrochloric acid, then soak your food in it and cook the food. Properly measured, it simply forms salt (NaCl) water.
