I will only remove small amounts of gum because it's a pain in the arse to do masses of the stuff.
How do you price it up, by the spot or just guess how long it's going to take?
Years ago I did a modelzone shop riddled with the stuff and even though I made good money from it, I wouldn't want to spend so long doing that again.
Nowadays , if there's a lot of it , my quotes are too high to get the job.