Question?

[SGM]

I've used the Rust-oleum Hammertone paint on a few of the parts on my machine, today after painting I actually grabbed the can and read the label.  It states that it shouldn't be used on galvanized metal.  What's that all about?

Thanks,
SGM

[collecture]

I am guessing that the galvanizing will interact with the paint and may peel up under your freshly painted piece.
Just strip it before painting.

[loman4ec]

I have painted thousands of galvanized pieces with Hammer paint and never had any problems. I have also used them for a long time after painting and it has always worn well.

[johnieG]

I've aslo used Rustoleums Hammertone paint on galvanized metal shelves, etc. it works very well, but you'd want to make sure that there isn't any "white-death" (white zinc-oxide) on the surfaces as it is very powdery & will cause the paint to peel & blister,

I just go over the surface to be painted with some medium OO-steel wool ( wear a dust mask as zinc-oxide is an irritant to the throat & lungs, and it's a good idea anyway regardless!) to remove any loose oxides, or the chemical method would be to use a metal prep solution such as phospheric acid (metal prep) to strip the gavanizing off of the base steel, which is fine if you can dip the parts in a suitable sized plastic tub, but it's a bit of a chore if you're trying to do tank/liner thats still in the machine. PS...Always wear rubber gloves, a long sleeved shirt & eye protection when using chemicals too!

or you can have the pieces media blasted to remove the plating too.

[loman4ec]

Yep John is right. I use steel wool and a good bath. That has always worked for me.

[johnieG]

Something else I forgot to mention, when it comes to painting galvanized metal, the recomended (old school) method is to clean off any loose oxides & prime it with a latex primer then top coat it with the finish top-coat of paint. in fact the "Hammerite" brand of hammered finished paint has a spray-on primer, but you usually won't find Hammerite in the big-box stores ( Rustoleum rules the shelves there) but most smaller paint suppliers do carry it, Hammerite by the way has micro-fine glass particles in the mix that wears like iron, just a quick FYI.

[sodaworks]

I to apray alot of the hammertone paint. I always media blast the parts to insure proper adhesion. I've never had a issue yet!