[RocktimusPryme]

Kroil is great, Mouse Milk is really good too, we used to have that in the flam cabinet overseas. People look at it oddly because its not in an aerosol can but it used to really save us on the hardware when we had to change turbochargers.

My other big trick that people laugh at but I swear by is to use a tool dipped in valve-lapping compound. Its particularly effective on phillips screws that are trying to strip, but it works on any bit to an extent. An old timer showed me that on the airfield my first deployment and Ive been using it successfully ever since. Thats always my first stop before I try something destructive. Helps being able to re-use your original hardware. THe OPs issue is probably too far gone, or too badly stuck for this trick to help though.

https://www.youtube.com/watch?v=xk1zrR0FoAk

Not to hock my own stuff, but I did a video on this when I was taking some old screws out of the door sill in my 62. Got a stuck screw out in the sill, and got what I think was a screw that had been in since production in the wire cover underneath.