Here's the damage. Looks like a sloooooow leak from a poor quality stock bleeder fitting. I'm a little upset about it, as these were the stock fittings which I never removed, only ever bled (which shouldn't move the lower fitting at all!). My rims which are also powdercoated and exposed to that same brake fluid (it pooled in the rim), didn't bubble or suffer at all. I'm dissapointed that Wilwoods coating is so thin and easily damaged.
I kinda feel like a high performance (and expensive) brake caliper shouldn't leak from its bleeders...nor should it use goody "proprietary" bleeders either. The design seems to just create an additional point of plausible leak, and there is no other bleeder that would be able to eliminate the brass lower fitting that leaked.
So summit sells a replacement set of 4 for like $11, but then you need shipping and waiting 3-5 days...which I wanted no part of, bringin the total to around$19 for 4. I wanted a better solution, but calling parts stores didn't yield much.
The thread is 1/8-27 which is NPT. I found a few random part #'s in PDF displays from parts stores, and found something that actually lists as a "Repair Kit Part". This so called repair kit is actually the correct bleeder replacement! I crossed the part # over in the NAPA fittings and brakes catalog, and sure enough I could get one from the local main store for under $8.
I let some liquid thread sealant tack up on the fitting and installed it into the bleeder hole. It threads in perfectly, and seals fairly quickly. The bleeder portion seems to work as it should. Strangely, the wrenches that fit these are metric (my sae line wrenches didn't fit tight)...but everything else is pretty much the same. Snugged them up, and the leak seems to be corrected. Now if only I could FIX the powdercoat.