Bob Engelhardt wrote:
I am repairing an aluminum brake (i.e., a brake for bending aluminum
house flashing/cladding). It is made of aluminum castings and
extrusions, held together with steel bolts and screws. Every single
bolt/screw is corroded in place! Not so much rusted as bound-up by
corrosion of the aluminum it's in. AND ... all the screw are Phillips
head! &!@^&%^%$&*?!

If you are having trouble getting those Phillips head screws out, get a
hand impact driver. 20 years of working on motorcycles demonstrated the
value of these inexpensive tools to me. With a proper fitting driver tip
and a few whacks with a hammer, almost any screw will come out.

BobH