Scet wrote:

I don't think paint thinner is appropriate to use. It is highly flammable
and will damage paint, obviously dependent on the type of thinner used.

Paint thinner in the U.S. is also called "mineral spirits". It's no more
flamable than kerosene (which you call "white spirit"), is less oily, and will
definitely NOT harm any paint that's likely to be on an aircraft.

George Patterson
Some people think they hear a call to the priesthood when what they really
hear is a tiny voice whispering "It's indoor work with no heavy lifting".