Well I'm going with Pro-Kote-Indy! I called them yesterday and they seemed pretty good. They can coat the mufflers and everything except the mufflers will be coated inside and out. Turn around should be about a week plus shipping. Their prices are a bit higher than what is listed on their web-site. They are saying $475-$500 price range and this is flange to turn outs!
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We didn’t grind the welds flat but opted for strength vs. looks! So they are obvious but should be less so once coated? Not all mufflers can be coated, one of the keys is how well they can be sealed during the process! They are going to use a threaded rod through the muffler with a plug on each end for mine. I will snap some photos before packing them up so we can do some before and after comparisons.