Here is another twist for you if you have any sandblasted panels. PPG does not recomend and advises against metal treatment on sand blasted metal. Here is some info from the site, It's in the pdf below. Does this also mean that Picklex20 as well as other should not be used ? Does any one know why ? I was going to call the tech line on Monday to ask as I'm ready to spray some DP on my panels and I have used their DX520.
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