Quote:
Originally Posted by MarkM66
It's not the movement, it's the hardened mig weld vs the normal sheet metal. It'll expands differently with heat. And it's worse at a place like the top of the b pillar, where sun would hit in directly.
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I'd have to disagree. You're telling me that metal finished MIG wire will have significant enough difference against cold rolled steel in expanding and shrinking at temperature changes ,that it will show through primer and paint?If your theory is true, why I do not see brazed roof & quarter seam on many imports bleeding through? Does brass expand and shrink at same exact rate as steel?
I'm working on 94 Supra at the moment ,replacing one quarter,the seam was brazed with metal finished with zero filler or lead under paint,with less than 1/16" line of brass visible in the actual seam.
I work on and own MKIV Supras and have yet to see one that would show this seam through paint on these cars.
I also have done plenty of antenna,maker light,wipers and various holes shaved over last 22+ years on customer's cars with MIG and have not seen any come back .Can you explain?