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post #1 of (permalink) Old 09-11-2000, 01:00 PM Thread Starter
 
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Best prep for virgin bare metal?

Getting my ducks in a row before welding time. I've got several brand new items to be welded to my frame: rear crossmember, body mounts, spring hangers (cut-off the CJ units & bought YJ units), tall rear shock mounts; and am wondering what the best way is to prep these things for maximum paint adhesion...figure they'll be easier to work with while they're loose. They're all bare, smooth steel except for the YJ hangers which have some cheap paint on them for storage/shipping. I had some adhesion problems with the new rear crossmember on the original Jeepskate and don't want to travel that road again. TIA.

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post #2 of (permalink) Old 09-11-2000, 01:24 PM
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Re: Best prep for virgin bare metal?

If it's very clean ( ZERO rust ) and degreased with final wash you can't beat a zinc chromate primer, it's mostly used on aluminum but works very well on all metals. Only catch is price.

post #3 of (permalink) Old 09-11-2000, 01:32 PM
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Re: Best prep for virgin bare metal?

New metal? The only "new" metal I've seen is after I've welded. Check out NAPA, they carry a line of etching primers. I've seen them work, when you cut the metal after the paint has adhered, it looks like the paint "soaks" into the metal, it's 1/2 way through on 1/8". I usually just clean everything up and Hammerite it. Let it dry before welding though, the welding will burn the close stuff away, but it's better than painting it afterwards. Just make sure the two surfaces to be welded are bare and clean, for the best weld.

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post #4 of (permalink) Old 09-11-2000, 02:16 PM Thread Starter
 
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Re: Best prep for virgin bare metal?

Thanks, I'll give that a try. I just remember the *horror* of painting the first crossmember and watching the POR-15 streak across it and flake off after it dried when I scraped things across it, so I don't want a repeat performance. Do you think it would be okay to paint the insides of the frame rails before welding or would it be best to wait (just trying to do things during the down time so that I feel like I'm accomplishing something other than sitting on my thumbs)?

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post #5 of (permalink) Old 09-11-2000, 02:18 PM Thread Starter
 
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Re: Best prep for virgin bare metal?

Would Variprime fall under this category? I have some sitting on the shelf that a buddy gave me.

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