Miles,

   The way I fix teak plywood that has been damaged is to find some teak of a smilar grain and colour to do the patching rather than to use just epoxy.  I rip the teak usually using a table saw to a thickness just a bit more that the original.  Cut my patch pcs. Slightly larger than the areas to be repaired.  I note and line up the grain direction when cutting these patch pcs.  Then I lay the patch pcs. Over the areas to be repaired and mark with a fine pencil. A sharp chiesel and some patience should give you a tight fitting pc.  Epoxy in place,  cure and then plane/scrap or sand to thickness.  

Best,

James

SV Sueno

Enroute to Cephalonia