Questions About Welding??

I have 2 questions about welding to make sure this is the last time I see this steel for a long time...

Question 1: I have heard that welds are prone to rusting under paint. Is there something I should put over my welds before I prime over them?

Question 2: Is there a product I can put over my (butt) weld seams incase I miss any pinholes that will prevent moisture from coming through and bubbling the bondo, primer & paint above?

Thanks as always!!!

We sandblast ALL welds, then apply epoxy primer. I hold a light behind the weld to see if there are any pinholes before priming.

Steve

www.clarkclassic.com

They make weld through primer. Bloxide Weldable Primer or copper weldthru primer or Cold Galvanizing Compound. Do a search at eastwood.com for the particulars on each.
Cheers

I tried Rustoleum's cold galvanizing and the welds were porous. I now use SEM's weld through primer and am happy with the results.

Quote:

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I have 2 questions about welding to make sure this is the last time I see this steel for a long time...

Question 1: I have heard that welds are prone to rusting under paint. Is there something I should put over my welds before I prime over them?

Question 2: Is there a product I can put over my (butt) weld seams incase I miss any pinholes that will prevent moisture from coming through and bubbling the bondo, primer & paint above?

Thanks as always!!!

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1. Your welds will rust through if they are not dressed properly after welding. Grind them smooth and/or sand blasting will cure this...

2. As for the pinholes. the best way is to put a light behind the panel and turn off the lights in the garage.... Use your MIG to fill any pinholes and then grind/sandblast before priming.


Spray it with 2 coats of epoxy primer after this is finished. Then do any necessary filler work..

Just my