I'm confused as to why you are sanding with 2000 grit, then using much coarser compounds afterwards.
Sounds to me like this is what is causing the problem.
Are you cleaning the wheel after each compound change? Better still use one wheel for one compound.
Why are you using BLACK compound with sisal? This is VERY COARSE.
And as a final finish GREEN? It's a cuttin g compound!
Go back to basics. Use brown, then maybe blue with a canton flannel or loose wheel.
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