Posted by Kaegi [76.22.23.236] on Thursday, January 01, 2015 at 03:46:23 :
In Reply to: Phosphoric Acid Question? posted by Willy-N [72.171.192.61] on Wednesday, December 31, 2014 at 21:15:16 :
I prefer Fertan. non toxic, biodegradable, no smell, can get on any surface and it cleans off. applied WITH water mixed in. and goes deeper into the metal with each application. Been around for many deecades. I believe originates in UK or Germany.