My technique for stuck fasteners; spray, tap lightly with small hammer, re-spray. Continue. I have gotten 1 1/4" galvanised shackles which were entirely covered in rust apart using this method and a couple weeks of patience.
Look for penetrating oils which contain tri-flo (can't remember the un-contracted name of the solvent anymore.)
Looking forward to trying acetone/hydraulic oil.
Look for penetrating oils which contain tri-flo (can't remember the un-contracted name of the solvent anymore.)
Looking forward to trying acetone/hydraulic oil.