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It does look like a bad glue job to me.
Sent from Deep Space by Abacus
Can also be oil coming up if stored in a case. If so leave it outside and it will be gone on a few days.
Flecks of debris between the blade and the sponge. I had exactly the same thing on my last glue job. (I'm new at this!)
I really don't think the concern with Liu Guoliang is going to be winning the Olympics. It's basically already set in...