Hi there. I’m removing all windows etc from a Barth airflow trailer. 70% of screws extract with pb blaster and a clutch bit. Of the remaining 30%, half can be extracted with Vice grips and vanpliers. The remaining are too corroded to get a grip on. None of us can get them started, including pro carpenters. These (presumably original) screws are too hard to use an easy out or similar on (or at least the easy outs available at Lowe’s). What are your strategies? What has proved successful for you? Thanks Kitter in Charlottesville
p.s. we’re in the market for a small Barth rv (21-24’) to rehab if anyone is a seller.

Welcome to the site. Good luck with your project!

I have had some luck using a small punch (about the size of a nail set) to beat around the nub of the screw sideways while oiled. Sometimes they can be wobbled loose. Tedious, but might work.

Good luck. For a few cents more they could have used stainless screws...

are the screw heads accessible with a grinder?

Buy some cobalt drill bits. they will drill thru them.
Kenny

I've had my best results using SeaFoam's Deep Creep.and using a left handed drill bit.