A Black thrashed 911 Turbo. With the exception of a few areas on the bonnet (down the center) that read mid 4`s, all Aluminum panels read scary low to me. Low to high 3`s. The rear quarter panels are mid to high 4`s. I`ve seen similar readings on other 911`s and I`m just not sure how to approach correction - do I have 2 Mils of clear on a 3.6 reading?
TIA
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