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Antique Tractor Paint and Bodywork

Whats best spray can primer?

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Nylon

07-12-2007 21:04:43




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I have some awkward unremoveable peices I need to paint. They are inside of a cab so weather protected. Going to use plain old acrylic enamel out of the can as a topcoat. Stuff is suprisingly durable. I will be applying primer to pretty much bare sanded metal. I had been using some rusty metal primer on some of my stuff cause worried about rust pits. These pieces dont have much for rust...very minimal. I have found that the rusty metal primer stays pretty soft because it contains fish oil that penetrates the rust and doesn't allow further oxidation. Have used it before before I heard about picklex. I have some rust treatment from napa but reading the contents there is no reference to phosphoric anything. I tried using some of that stuff on my truck door bottoms...road salt. Didnt seem to work too well. I have some cans left over and thought about trying it. Then decided not to.

Anyway wondering whats got the best stick to bare metal under implement spray can paint?

Thx,
John

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Bob with a 60

07-16-2007 18:37:01




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 Re: Whats best spray can primer? in reply to Nylon, 07-12-2007 21:04:43  
Wow how complicated simple questions can get ..... ..... .... I use a product from Napa,not sure of the # right now. Its called self etching primer and its great for small jobs on bare clean metal. I only buy the Napa brand. (They do sell others at Napa)For bigger jobs I like the Omni epoxy. But have had no probs with the self etching stuff. Two coats should do it. Follow the directions on the can.

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NYVines

07-14-2007 08:11:10




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 Rusty Primer - Bare Metal in reply to Nylon, 07-12-2007 21:04:43  
Heres a problem...we are restoring a Farmall A at our vineyard. We primed the entire dis-assembled tractor with rusty metal primer because thats what we had some gallons of on hand. We are about to paint it very soon. I read in this post that rusty metal primer is only good for rusty metal.... will it matter a great deal that the machine is primed with possibly the wrong primer??



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Krumholz

07-23-2007 13:45:24




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 Re: Rusty Primer - Bare Metal in reply to NYVines, 07-14-2007 08:11:10  
I am not a paint genius and even spray can paint befuddles me. Heavens, I been married three times and I have never been allowed to paint more than 1 time for any of them. That said, I painted an old Farmall with Rustolem Rusty metal primer in total Many spray cans. Then I took it to be painted by a friend who used hardner in his paint and that was almost 5 years ago and it still looks good as new. Dont worry at this stage. Just paint them and get on with your life.

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Rod (NH)

07-14-2007 09:32:41




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 Re: Rusty Primer - Bare Metal in reply to NYVines, 07-14-2007 08:11:10  
If you used Rustoleum's Rusty Metal Primer, the manufacturer sure does not recommend it for use on clean or lightly rusted surfaces. Only for heavily rusted ones. Read the label directions of the product you used carefully and proceed at your own risk. Yes, it could matter a great deal if you don't strictly follow the manufacturer's written instructions for each paint product you use.

Rod

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NYVines

07-14-2007 10:29:08




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 Re: Rusty Primer - Bare Metal in reply to Rod (NH), 07-14-2007 09:32:41  
Can anyone offer a solution except for the obvious? I do not want to remove all the primer.



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NYVines

07-14-2007 10:27:40




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 Re: Rusty Primer - Bare Metal in reply to Rod (NH), 07-14-2007 09:32:41  
Thanks for the info.... I may have a problem in as much as it is all primed already



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rustyj14

07-16-2007 20:03:15




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 Re: Rusty Primer - Bare Metal in reply to NYVines, 07-14-2007 10:27:40  
Aww, just sand the primer with some 240 A sand paper, blow it off with air pressure, wash it down with prep-sol, pre-kleeno, or any good final wash, and paint it! Heck, i painted my old ratty Ford Ranger with Rustoleum rusty metal primer, and some Rustoleum maroon paint, with a sponge brush, and its still on there, and still shines!



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CNKS

07-13-2007 17:23:11




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 Re: Whats best spray can primer? in reply to Nylon, 07-12-2007 21:04:43  
Rusty metal primer needs rust for it to work. If you have bare metal that is the wrong primer. I'm not a spray can fan, except for occasional small parts in out of the way places. But, to be sure everything is compatible, use the primer recommended by the company that made your spray can topcoat. If you have most of the rust removed from the pieces in your cab and don't want to use Picklex, which is expensive and is not sold by local retail stores, get some Must For Rust from Home Depot. No proof of this, but they seem to give the same results. As to the severe rust in your doors, you are not going to eliminate severe rust damage with phosphoric acid or anything else. The only answer is to remove the rusted areas. Rust converters containing phosphoric acid are best used as rust converters on old rusted implements, or other heavy steel, not sheet metal (except for situations like in your cab). Others know much more about that than I do, as I have never tried to paint over rust.

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Nylon

07-13-2007 18:05:36




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 Re: Whats best spray can primer? in reply to CNKS, 07-13-2007 17:23:11  
Doors and panels are getting sandblasted once the glass is out. I am shooting the instrument panel in black. I am not going to take out all the instruments and throttle linkages and steering tube. I hand sanded everything down. The steering tube (green)disappears into the instru panel and the synchro shifter is also green in the panel while the panel is black. In a cab and just too awkward to shoot small attached areas in different colors. Very little rust here. Think I will use just a bare metal primer. Too bad you cant get epoxy primer in a can!

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CNKS

07-13-2007 19:13:27




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 Re: Whats best spray can primer? in reply to Nylon, 07-13-2007 18:05:36  
Two part rattle can paint is available, at least to some body shops -- don't remember the details, not likely retail at this time. It is used for touch up and minor repairs. Read an article about it a while back.



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Rod (NH)

07-14-2007 04:25:26




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 Re: Whats best spray can primer? in reply to CNKS, 07-13-2007 19:13:27  
It must have to be used up within a mattter of hours due to pot life considerations. Or am I missing something? Seems to me a better choice (plus cheaper) for a DIY consumer would be a Preval Sprayer. It wouldn't be appropriate for a surfacer but it does work with epoxy primer - at least with PPG OMNI 170. I wouldn't attempt it on larger parts but for touch-up or small parts, it works well. Clean up is a snap since you can replace the glass container with a throw-away paper drinking cup (although you need to use both hands for that). And for getting primer into smaller nooks and crannies, a brush "touch-up" application could also be a viable choice.

Rod

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CNKS

07-14-2007 18:39:34




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 Re: Whats best spray can primer? in reply to Rod (NH), 07-14-2007 04:25:26  
My understanding (lousy memory) is that the rattle can stuff is mixed as it sprays, thus pot life is not a problem. The article was in some internet magazine that caters to body shops, several months to a year ago, could have been experimental, also.



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