my friend and i did it to his, put a little degreaser in there, and threw it in a bucket big enough for the whole ball, cover the holes with some tape and sat it in there with warm water from the kitchen sink, let it sit for 25 minutes, pulled it out and man that was nasty water, lighty sanded back to OOB (passion) and wha la all done no issues at all
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Current Average 177
Current Balls:
Storm Hot Rod Hybrid 15lb
STORM AGENT 15LB