Yeh Bill I have had some bad experience with some of those cleaners. Some will eat aluminum and others will destroy seals, be car full. It seems that there is some technical design difference between solvents and detergents, but I do not know what it is. A couple of the guys I respect will wash the parts of with warm/hot soapy water when they are done. In addition, the time the things are exposed to the chemicals makes a big difference. I once took some rocker pedestals from a tr3 and dropped them in a can of some stuff I got at the parts store. It was some new degreaser in a purple plastic gallon jug, and the next morning, they were white little furry things. I like a product called Moss solvent; I find it benign. I also find a die-grinder with a wire wheel very helpful.