I'm rebuilding a 20 frame extractor from Dadant that was built in '79. It has 5 collars that the stainless steel basket is welded to, 2 high 3 low and they are tightened on a stainless steel shaft with allen screws. Here's the weird part, they appear to be regular steel. They rusted such that I stripped one of the bottom allens so I can't get it off. I can't drill it out as it's too close the the basket and I can't get anything in there. I've got the Camcote to seal it once I get it clean but how do I get it clean? I'm considering sand blasting it but that will only get the exposed areas whereas Naval Jelly might work better for my challenges. I'd really appreciate any feedback from anyone with any experience in this arena. Thanks in advance.