Good article re stuck fasteners. I taught “Shop” for my 35 year career (Auto, small gas engine repair, marine engines) and developed/used/taught many stuck fastener tricks depending on the circumstances. Two months ago a kind neighbor gave me an old Boston Whaler which had not been run or cared for since about 2000. I needed to take the V4 power head off the outboard. When used previously, this motor was in salt water, compounding the problem. The power head bolts are upside down and probably 6" long. Turning them would undoubtedly break them off. I drill an angled hole through the casting to the fasteners threads and fill the hole with penetrating oil. Patience pays here.The hole is a reservoir, keep it filled. I removed the power head and disassembled/repaired it without breaking one fastener. Ive used a saws-all with home made saw-blade holder to cut through castings to dis assemble, repairing the saws kerf before reassembly. Ive welded new nuts to the end of damaged fasteners (bolt, screw heads) and they generally come out like butter.
Unfortunately, Shop (Industrial Arts) classes were seen as obsolete by those higher on the food chain and the town I worked for closed all the wonderful programs via attrition. No one there to teach our young people, and where some of the most challenging students found great success in school for their very first time.