Is this the best way to get to kill rust?

[agemeansnothing]

I am in the process of paying my mom back for a sander I bought. It is a Snap On 8' inch Random Orbit air sander. So my question is, is there any better way or sander to get rid of rust? Also what color of primer should I use. P.S. If this is a stupid question let me now. ( I'm learning.)

[hls30.com]

Cutting out rust and replacing metal is the most effective. Abrasive rust removal does not purge the rust from the pores of the metal, but if you also use a variant of phosphoric acid to eat the rust out of the pores(Ospho, Metal Ready,...) You have a very close second if the metal has not been perforated(or you do have access to treat the backside).

Color of the primer is not important until you are finishing up the bodywork-at the repairing rust stage use an etching primer, as you get the rust handled, then use a sealer, then filler and alternating colors of primer to help your sanding get the bodywork as close to perfect as you can.

Enrique has a great article in the archives, and there is one is the current issue of AutoRestorer Magazine-and probably will be one in an upcomming issue of SportZ as Art gets the project car in process...

Will

Ps the only stupid question is the one you either didn't ask, or use the search function here on the site to help find the answer for.

[DatsunZsRule]

Best way to kill/prevent rust? POR15 is the best out there.

Go to there website and take plenty of time to read it and learn about it. LOT'S of good information there that should answer just about any questions you may have about it.

Here is the link: http://www.por15.com/faq.asp

[jmanz6]

POR15 is not good to use as a primer type coating. You must top coat it within 2 hrs or it dries too hard. hls30 is absolutley right. If you can, the best way is to cut out the metal and weld in new (there is no rust). If oyu can't do that, or the part isn't rusted thru, you can sand it down, treat and prime. You can get some stuff called Naval Jelly at the local parts store. It works to eat the rust out of the pores. You must sand off the heavy rust first though. It leaves a phosphoric coating that inhibits flash rust for a long time. ALso, Eastwood has some treatments that work great for getting the last little bit of rust out. You are heading in the right direction though. Start sanding and don't stop until you see clean silver metal all over.

[hls30.com]

Por is for use where a cosmetic topcoat will not be an issue(not for the beautiful reflective surfaces of the car) it is too dificult to use when the surface above it must be glass-like-use POR for the underside of panels, under the carpet, in the nooks and crannies-it is great for stopping rust dead, but is is hell to apply for cosmetic beauty.

All of the phosphoric acid based rust treatments leave a ZincPhosphate coating if allowed to dry on the surface-it will prevent flash rust, and will not create an issue when etching primers are used over it-but do wipe the panel down with thinner, and tack it before shooting the primer or surfacer.

When a panel has been properly treated with A phosophoric acid based rust remover, there will be no dark spots on the metal, and the metal will appear mat gray (maybe with with a slightly sticky purple or blue tint as it dries to residue) If there are dark spots, they almost always indicate rust that has not been completely eaten. use a wire brush to aggitate the surface, and keep the area damp with the acid solution.

POR.com does have a great number of terrific products to help you in your quest for a rust free Z!

Will