Enjoyed the pics.
X2 JM.
To your question: no access to a blaster, or don't feel like buying one, messy, but try Citrastrip. Think spellings right. Does a great job without the harshness of some of the other products. I'm also a steelwool fan,0000. Rattle canning, been happy with the Eastwood stuff, in that it gives a pretty decent spray pattern, lays nice. Good for a few small single items vs. Breaking the gun out. Use what's left on a few brackets.
Actually does look good underhood. Not the typical shoddy wiring mess, pitting. Taken care of. Probably some good products/tips out there to rid the overspray, if so inclined.