I have unbolted some fittings on my boat. Inside the deck they were fastened through a Stainles Steel backing plate.
The backing plate appears to be sitting on a thin layer of a rubbery like compound something like Sikaflex.
Is there a method or chemical to clean this stuff off the fibreglass?
Or do I have to do it the tedious way and carefully scrape it off with a sharp chisel or similar.