Landreo wrote:Evapo Rust is a true rust remover. I use it all the time. I have parts from a 1920s adding maching soaking in a tub of evapo rust right now. I have used it to clean iron dust off old antique radio variable capacitors with no damage to the aluminum plates or the brass shaft. Derusted old micrometers and other tools. I have used it many times to free rusted and stuck engines with only one failure out of maybe 20 blocks. That failure required my 20 ton press to get the piston out ( piston and block survived and is back in the now running engine). Evapo rust does not affect the iron, just the rust. It works great.
It does not remove grease so I would still clean the block with washing soda or soapy water prior to using evapo rust so the evapo rust has good contact with the rust itself.
The disadvantage of evapo rust....$22 a gallon.
That's cheaper than removal of a stuck bolt, if it has to go to a machine shop. (Don't ask why I know that)
Thanks for your response. I'll try it on my next stuck piston, too!
Ed
