Join Date: Mar 2001
Location: Peoples Republic of Vermont
What Pete says. EVERY manufacturer uses a bare metal prep (etch) prior to painting. This conditions the metal surface so that paint will stick as well as removes any mill scale or foreign ferrous metals. Yes, phosphoric acid is a converter and using it in conjunction with scrubbing and/or abrasion is really using it as two things, a medium to remove the iron phosphate residue and an acid etch to the remaining metal.
I, personally, use Picklex20 as a pre-paint prep as it contains a lower concentration of phosphoric acid and a proprietary formula that does not require neutralization after application and, after drying, can be directly coated.
Master Series Silver is, from everything I have heard, a decent product and can be sprayed, brushed or rolled on. I have never used it but may try it on one of my tractors in the future. I have used, exclusively, Eastwood/Kirker epoxy primer with good results. It can also be sprayed, rolled or brushed on. It sands well, too.
What, me worry?
- Alfred E. Neuman