filled holes in transom swelling

[fieromx3]

so after removing stuff from the transom from the previous owner i was left with a couple of small 1/8'' holes. the transom is pretty new and was completly dry (boat was stored indoors with holes venting to air for 7 months) i then took a 1/8'' drill bit to just clean the inner part and filled them with epoxy. i always read not to gel-coat over epoxy but i decided to try it anyway... i scuffed up the area really well and cleaned the crap out of it with acetone. i gel-coated the areas and turned out great! the gel is not flaking and so far has been very durable. i went today and started the boat as it has been sitting for 2.5 weeks (no time to get on the water  and i noticed the holes i had filled in were swelling, as in they now look like little bubbles sticking out from the transom!!! what can cause this? i plan on taking it to a shop this winter and having all imperfections fixed by a professional but curious whats causing this and if there is reason to be alarmed. i just hope water didnt get in the transom and is swelling the 'repaired' areas

Edited July 16, 2013 by fieromx3

[insufishent]

Sounds like a chemical reaction is taking place there like the gelcoat cant cure

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[Second Nature]

Did you wet sand and buff the gel coat repair when done. I buffed a repair I made in my gel coat and it raised my repair slightly. It must have had something to do with the heat generated I'm guessing. Repair is still intact and looking good so I haven't done anything since

[fieromx3]

i wet sanded it to get the uneven-ess of the gelcoat smooth as i brushed it on. i didnt buff it as i didnt care to make it look perfect. they were nice and even for a couple weeks and then all of a sudden they swelled a bit.

Edited July 18, 2013 by fieromx3