Probably not a good idea. If you want it to stay for more than a single run you would have to sand them down, paint a couple layers of automotive paint and clear coat. IMO not worth the hassle and a couple mm of paint on the inside of the ratchet could cause problems.
Depending on what your trying to do you may want to check out just getting a sheet of vinyl and cutting it to spec. Wouldn't ruin the paint and you can take it off. Just a thought.