Gentlemen, some advice please!
I have a well worn iron piston / steel liner set up that I would like to 'revive'. Back in Britain we used to call this "cherry bombing". Heat the piston up to red hot with a propane torch and quench rapidly. The preferred quenching fluid was automobile green brake fluid. This had the special property of not leaving a hard carbonized layer on the piston. I don't recall what was in the magic green fluid that made it so effective. When I check brake fluids in the stores today none of them are green!
So, the question for you experts is this, what is a current recommendation for a good quenching liquid for red hot iron pistons?
Any advice much appreciated!
Best regards
Adrian Land
San Carlos CA