The best thing I have done is to seal em with epoxy.if ur gonna do big batches an be a big time builder it's not for U.
I heat the wood in a small toaster oven then apply some sb-112 systems three.basically brushing it on till it does no absorb any more.Whipe off the excess an hang to dry...pour some in the thru holes an use a pipe cleaner to work it thru.Makes for a plug that is durable from the inside out.absorbs no water an the finish holds up better because the wood is tougher..U have to take into consideration it will add some weight to the plug..So if u have a fickle swimmer u may have to make some adjustments..T paint I lightly scuff em up an whipe with will-a bond an prime an paint..
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