Originally Posted by ICleanBrassWithJager
I've got an old shotgun, and I can only assume the inner mechanics haven't been cleaned since the gun was made. I've been trying to get the screws off with no luck, because I didn't want to risk stripping them. Any ideas?
Edit: the title is supposed start out with "what's the best". Autocorrect is a cruel mistress...
lots of penetrating oil, time, sometimes a bit of heat, depending on where the screw is located and some gentle rapping with a screwdriver and hammer.
first thing needed is the proper screwdriver for screws that are used in guns. without the proper screwdriver, even if the screw wasn't rusted and stuck, you stand the possiblity in stripping the head of it.
second, get some good penetrating oil and soak the screw. i use Kano Kroil and it has to one of the best there is. give it some time to work.
using a screwdriver and some gentle twisting motion, lightly rap the screwdriver with a small hammer. this will sometimes help break the screw loose.
last resort, if possible, putting a bit of heat on the part will break it loose. but putting heat on the part will depend on where the part is located and you also stand the chance of ruining the finish if you apply too much.