may i ask what you are using to seal the wood? becuase if a plug is properly sealed,it should be almost impervious to water absorbtion.by sealed i don't mean your clear cloat.i mean are you sealing the bare wood itself? after i have my screw eyes set,and the weights epoxied in place,i then dip the plug in a solution of boiled linseed oil cut with paint thinner in a 60/40 mix.then let the plug hang for at least 24 hours before priming,and painting.i have had plugs chip right down to bare wood because i riffled them off of bridges or rocks,and the plugs have seen many hours of fishing since then,and have not absorbed any water.just a thought.
guzz