I second the 50/50 acetone/ATF. The ss prop for the mid cabin hatch on my 37 refused to move being ss into aluminium. I hit it with PBlaster every week for overr a month with no success. I then went to 50/50 Acetone and ATF for two applications and I got it to move. Now it is my got to when I have a stuck fastener.
cseltzjr wrote:
You might try to get the area very warm throughout (maybe a heat gun instead of a torch) so that the warmth goes through the metal. Then apply a mixture of 50% acetone and 50% automatic transmission oil. Let sit for awhile (day or more).