hey nate i just wanted to make sure, tell me again what to use Phosphoric Acid on again? and especially what NOT to use it on. i really need to get some pics up of my 50 gmc up. i've got the hood "perfect" in my mind. blasted it down with silica, etched primed it , and now have black primer on it. ive started workin on the fenders now.
Phosphoric Acid I use ir on steel mostly as you can give cast iron parts Hydrogen embrittlement , this means they can crack or break more easily after you're soaked them in this stuff . Of course , you can remove Hydrogen embrittlement by baking the affected part in the oven @ 200° for a few hours (there goes Nate using the kitchen over for fixing old truck parts again ) . I also use ot to clean up chrome when the chrome is seriously pitted . Aluminum and pot metal are NO-NOS ! . I've used it on some brass carby jets that were beyond the pale , completely clogged up with that crusty stuff , no way to clean 'em plus if you jamb a steel thing in them for cleaning , they usualy get oversized or the tiny scratches you make , will create some strange swirl patterns (flow problems) that'll result in hard to diagnose running problems . it worked like a charm , the brass jets came out looking " As - New " and they gauged dead nuts size wise too . I hope this helps , remember : this may be dilute acid but it's still ACID so wear gloves , use eye protection , have a hose ir other source of clean water handy to flush your eyes , etc. don't spill in on the grass , Always add the acid to the water , never , EVER add water to any acid......and on and on...
