I have seen that happen with car s too. The vinyl tires will leave a impression if they touch other plastic. It is a chemical reaction of sorts. Here is what I would do. Lightly scuff the blade where the imprint is, fill with Squadron Green putty, let dry, sand smooth. Presto! Fixed rotor. Hope this helps.
Lee
Hi, I am Lee, I am a plastiholic.
Co. A, 682 Engineers, Ltchfield, MN, 1980-1986
1 Thessalonians 4:13-18 1 Corinthians 15:51-54
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