Metal Penetrating Spray

[Paul Schooley]

There was a product mentioned recently that you can spray or brush onto uncoated metal to protect it until you're ready to prime, even if it's a very long time before painting. Anyone remember this thread?

[WCB4]

Hello Paul; I belive that the product that you are looking is POR-15 by 3M. Stands for Paint Over Rust. Just wire brush off the lose scale(not till it shines) and apply to the remaining rust, I preffer using a brush to work it into the aera being treated. Most paint manufactuers have a simular product by thier own name.Try a search on POR-15!
Bill

[silverc4s]

Paul,
There is also a product known as "cold galvanize" that I have used with good results on heat exchangers and other mildly rusted steel parts. I believe it is used by farmers & ranchers to protect all sorts of metal implements that are at the mercy of the elements year round.
It is a rattle can product mainly consisting of ZINC particles in a clear enamel? suspension..

[Zithlord]

I think that you may be thinking of Metal Ready from POR-15, not the paint from POR-15? The Metal Ready has acid in it and leaves a thin layer of zinc on the metal. You can use it on the clean metal before using almost any kind of primer or paint(and POR-15). Look at their website. http://www.por15.com/PRODUCTS/CLEANE...0/Default.aspx If you where thinking of POR-15 you can leave it for some time before priming over but it will deteriorate from UV rays(sun)

What I think is strange is that the website of POR-15 states that you rinse with water 10 minutes after applying the Metal Ready, it tends to leave brownish stains. I have used thinner to rinse of instead. Any comments on this?

John

[HarryD]

I think that you may be thinking of Metal Ready from POR-15, not the paint from POR-15? The Metal Ready has acid in it and leaves a thin layer of zinc on the metal. You can use it on the clean metal before using almost any kind of primer or paint(and POR-15). Look at their website. http://www.por15.com/PRODUCTS/CLEANE...0/Default.aspx If you where thinking of POR-15 you can leave it for some time before priming over but it will deteriorate from UV rays(sun)

What I think is strange is that the website of POR-15 states that you rinse with water 10 minutes after applying the Metal Ready, it tends to leave brownish stains. I have used thinner to rinse of instead. Any comments on this?

John

I do not think POR-15 is the product Paul is asking about.

POR-15 is a permanent (urethane based) coating that you apply to seal a treated surface. Metal Ready is a version of Naval Jelly which uses phosphoric acid to convert rust (iron oxide) to iron phosphate which is a stable material. Once converted, POR-15 seals this surface from the elements to keep rust from happening again. This why water is not an issue after you treat with any of the Phosphate treatments.

There is another product out there that allows you treat a cleaned panel so you do not get surface (or flash) rust until you are ready to coat. I think it is a petroleum type of coating that you have to strip when you are ready to actually coat the piece.

Some info on the subject: http://www.thefabricator.com/TubePip...le.cfm?ID=1328

Perhaps this product is more to Pual's need: http://www.lpslabs.com/Products/CorrosionInh/Lps3.asp

This web site is interesting: http://www.birchwoodcasey.com/rust/index.html

[boba]

This product was talked about. I have not used and no info on it, but if anybody has feedback would be nice.

http://www.roadsters.com/gibbs/

[Paul Schooley]

Yes, this is the product: http://www.roadsters.com/gibbs/ It sounds almost too good to be true. It should allow metal to be sandblasted and then sprayed with this stuff thus avoiding longterm rust issues prior to painting. Thanks for the help in finding this again. I'm ordering some tomorrow and will let you fellas know how it works.

[J-P]

There is also a product called Rust Bullet (Bullit, or some other variation on the word). You can find it through a web search. It is supposed to be some hight tech, MILSPEC, product that is capable of being applied directly over rust, as well as being used as a base.

My understaniding is, if used, you don't EVER have to paint over it if you don't want to because it does such a good job of penetrating the metal and stopping the oxidation process.