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Old 06-07-2013, 01:45 PM   #4 (permalink)
Born Again n00b
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Join Date: Dec 2012
Location: Riverside CA

I use PJ1 fog blocker on my cheap single pane JT that has a thermal coating and have not had a problem...even for a cheap mask I have to be really huffing to get it to fog. the PJ1 does not appear to have damaged the thermal coating in any way.
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