This screw won't budge!

[Hillbilly Delux]

Don't run the risk to booging the screw head. Kroil is your friend...you know the rest.

 

[eggwelder]

Have an old pre-war unmentionable with an aluminum receiver at a gunsmith for the last 3 months. He just got the screws out last week after 3 months of soaking in the tank, and all but one screw survived, which i think was buggered before i brought it to him.