need help removing back seat
 

I am having problems removing the flathead screw that the back seat rest is attached to.
It is pretty rusted looking... any suggestions on how to loosen this screw?

PB Blaster and an impact driver I bought from Amazon for about $20 got mine out.

I think I put the biggest screwdriver with a square grip I had in there, then I put a giant pair of vice grips on the square grip and then a cheater bar on the top grip and popped it loose.

I'm with SpyderMike on this...I used Kroil, an impact driver, and a BFH.

I'll give those suggestions a try. Thanks!

Use a wood chisel as a screwdriver. Get one a wide as the slot in the screw. It will transfer the torque better.

OK.. after trying to figure it out I went with a large washer held on with a pair of pliers. This gave me enough grip and enough area within the screw to turn it enough to break it loose and unscrew the rest of the way with a screwdriver.