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Antique Tractor Paint and Bodywork

primer choice.

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amg_520

02-04-2005 10:54:35

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I think I am going to use the 'Dupont Nason Fulthane 2K Urethane'to paint my john deere 620. I was wondering what primer would be the best choice to go with. I was told by the paint supply store they carry a no sanding needed primer for use on the cast iron and hard to sand areas. they also said to get a primer filler for the sheet metal and anything I want smooth, type dont remember the names. Let me know what you all think and have had best results with. Thanks

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Frank Stalfire

02-04-2005 18:59:17

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Re: primer choice. in reply to amg_520, 02-04-2005 10:54:35

Nason has an awesome new epoxy primer that came from the fleet line, can't remember the number but tomorrow I will go to the barn and look at the can I have and get back to you, it's the old Corlar 934 and is bullet proof, as for primer the nason 421-17 2K would be a great choice, just listen to everyone regaurding the safety of 2K products

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CNKS

02-05-2005 09:43:47

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Re: primer choice. in reply to Frank Stalfire, 02-04-2005 18:59:17

Frank or Rod, In the link Rod provided below, the tech sheet for Ful-Thane says that Nason Bond-Seal 422-XX is required. This must be used over the Ful-Poxy 491-16 and the listed primer surfacers, or am I missing something? PPG's Omni line mentions nothing about that. Thinking about trying Nason because my local PPG supplier is inconsistent in getting the IH 2150 (PPG 71310) consistent from batch to batch. I believe I need another dealer.

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Frank Stalfire

02-05-2005 18:57:36

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Re: primer choice. in reply to CNKS, 02-05-2005 09:43:47

The Ful Thane PDS Rod pulled up is the original Ful Thane and it requires a sealer because it is a poor hider and has low solids, the Ful thane 3.5 does not require a sealer and will cover better, as for the acrylic enamel, the Alkyds can with or woth out catalyst but not the Acrylics, the new nason epoxy is 483-35. hope this helps

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Rod (NH)

02-05-2005 20:15:03

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Re: primer choice. in reply to Frank Stalfire, 02-05-2005 18:57:36

Frank,

Looks like the wording is "recommended", rather than "required", regarding the sealer with the Ful-Thane 3.5. I am not sure of the significance of the different semantics here. I guess it means it will work w/o the sealer but DuPont/Nason doesn't recommend doing it that way. Or maybe the tech sheet is an old one and DuPont needs to update their website. I still find it odd that a sealer would even be recommended over an epoxy. Do you happen to know the color/shade of the epoxy? Is it black or dark such that light colors would cover poorly, hence the recommended sealer - which is gray, presumably a light gray?

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CNKS

02-05-2005 19:09:02

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Re: primer choice. in reply to Frank Stalfire, 02-05-2005 18:57:36

Thanks, I am printing this out for future reference.

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Rod (NH)

02-05-2005 13:37:42

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Re: primer choice. in reply to CNKS, 02-05-2005 09:43:47

I don't know since I've never used any, but you bring up an excellent point. It's the first time I have ever heard of requiring a sealer over epoxy for any product to be used on top of it. BTW, I see the epoxy doesn't have a specified time window to topcoat. Unusual. That sealer does, however, and it's real short - 10min to 1 hr. Shows the necessity of checking the manufacturer's tech sheets for all products and not extrapolating from other products or other manufacturers.

I've also noted in the past that NASON requires an iso- containing catalyst (hardener) in their Ful-Cryl II acrylic enamel which also seems unusual for an AE.

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Rod (NH)

02-04-2005 18:35:49

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Re: primer choice. in reply to amg_520, 02-04-2005 10:54:35

Hi,

What CNKS said. Why not stick with the products the manufacturer recommends? That way you'll be sure there will be no compatibility problems.

Rod

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CNKS

02-04-2005 17:46:20

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Re: primer choice. in reply to amg_520, 02-04-2005 10:54:35

I'm not famliar with DuPont numbers, If Frank Stalfire, a DuPont rep does not answer, my recommendation would be an epoxy primer on the cast, and the same epoxy primer followed by a 2K sandable surfacer on the sheet metal, all in the Nason line.

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CNKS

02-04-2005 17:50:27

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Re: primer choice. in reply to CNKS, 02-04-2005 17:46:20

And, it cannot be emphasized enough that you need a supplied air system to use the 2K paints, a charcoal mask will not filter out isocyanates. If you don't have one or don't want to lay out $500 or so, use a DuPont acylic enamel without hardener and a 1k surfacer. I don't believe their 2k epoxy will have iso's, but check to be sure.

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