Dealing with Rust, need expert advice.

[budnate]

Here is the Subject a í72 Buick with two holes in both quarters about 2.5î by 2.5.î
One is showing very slight blistering around the back half of the wheel well.

I plan on cutting out the holes and welding in patches, here are the questions -
I am looking for facts or proven methods.

I have dealt with rust before and it always comes back,
I had a very interesting talk with a fella that supposedly did what I had thought of doing,
Clean rusted area thoroughly and treat with ìQurox- a Polymeric Rust Converterî, I have used this brand in trunks and it seems to work fine and have used it extensively in the Commercial business treating piping in buildings before painting.

He then mixed some kind of stuff similar to JB weld, I forgot what he said he used, anyway he poured it along the inside of the wheel well and the quarter after treating it for rust, it needed to be a little runny to get down in that tight area, he then used a very slight amount of bondo to fix the wheel lip and repainted the car, he swears he owned the car for 8yrs after that and it did not come back, I had thought if you stopped the rust with the proper chemical let it dry then apply something that would prevent oxygen from getting at the area it would have no way to start up again.

Ok pros give me your wisdom.

Oh and donít give me to hard of time for buying a Buick, I couldnít help myself, it is a Grandma car that is really nice except for a cruddy repaint and little bit of rust in the rear, The interior could pass for just rolling off the assembly line yesterday!

Thnx Bud. [img]/ubbthreads/images/graemlins/flag.gif[/img]

[55chevy]

What about POR-15?

Ed

[budnate]

Thnx Ed,
I have never used this stuff before, but just visited the web site, Looks like the miracle product, I think I will give'm a go with there metal prep and the silver color it should work just dandy in this car.

Thnx Bud. [img]/ubbthreads/images/graemlins/biggthumpup.gif[/img]

[x44d80]

Budnate,you effectively answered your own question. If you weld in patch's or pour in goo the patch must not be allowed oxygen or it will rust again. Any good body shop seals the back of a patch will a sealer of some sort and the outside with a good sealing primer.... anyway, thats what my buddy that paints cars advise is. On www.Camaros.net there are alot of good tips on this particular question if you do a search.

[Kurt S]

One thing, POR-15 does not like a smooth surface.

[YENKO DEUCE REGISTRY]

I'll second that KurtS, I tried it on a small area - it started to peel, so I took it all off and stashed the stuff somewhere. Personally, I won't waste my money on that kind of stuff again.

[ZL1mike]

I tried it but I sprayed it on with very little air pressure and It seemed to work and adhere just fine.

[budnate]

Thnx guys,
I talked at length last night with a body shop Forman on another site, he did not care for the product either and another fella chimed in and claimed there product did not work as advertised, So I am back at square one in my mind, guess I will site back think about it for a minute, [img]/ubbthreads/images/graemlins/rolleyes.gif[/img]

Thnx Bud.

[Schonyenko2]

Bud, if you cut out the rusted area, and weld in a patch, welding the seams complete, with no pinholes, grind, and fill as needed, prime with an epoxy primer ie dp90, a primer/surfacer ie K36 and paint, that should be all you need on the outside. We use 3m rustfighter sprayed on the inner panels. It should last a long time for you. Schonye

[Kurt S]

POR-15 does work and has a tough skin.
It just needs something to grab onto: sandblast surface, rusty surface, ect.