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  #1  
Old 12-10-2017, 11:20 AM
ShortSnorter ShortSnorter is offline
 
Join Date: Dec 2013
Location: NOLA
Posts: 350
Default Is this corrosion?

I just pulled the plastic off after ~2 years and this was underneath:



There was a good bit of residual adhesive over the area that is ?streaked? but that came off with acetone. MEK had no effect either.
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  #2  
Old 12-10-2017, 11:28 AM
designerX designerX is offline
 
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I'm guessing it qualifies as very slight surface corrosion. Hit it with a scotchbrite pad (just like you would if it had a mirror like finish) and continue building.
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  #3  
Old 12-10-2017, 12:37 PM
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JonJay JonJay is offline
 
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Maybe a slight amount of oxidation, which is technically a type of corrosion but it looks more like residual offgasing from the plastic protective sheet. Take a solvent and see if it wipes off. Otherwise, a light polishing as already suggested will clean it right up.
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  #4  
Old 12-10-2017, 04:12 PM
rightrudder rightrudder is offline
 
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Or leave it alone. Completely normal for the Alclad to form a light layer of oxide. If you're going to prime, then yeah, I'd hit it with a Scotchbrite.
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