How to make a transom into Fresh canvas?

[Lordwrench]

I just bought a second hull to get into shape,it's a 74' 20 sf that was stolen then sat on the side of the road for almost a year.I am about to tackle filling all previous holes in the transom.I want to fill everything and start from scratch. Can I use six-ten thickened epoxy for simplicity,ream out the holes clean and fill them? Do the holes need to be countersunk or beveled back some to give surface for the epoxy to bind to the outer skin? Some holes are all the way through and some, like the old trim tab mounts, are not. These I am thinking I will drill out a bit larger,maybe 1/4 inch or so to clean up so they will fill and bond completely. How large of a hole can I fill with thickened epoxy?I have seen Shine do up to about 1 7/8 ,which is larger than any of mine. Any guidance appreciated,Thanks

[McGillicuddy]

I'd suggest drilling a few more holes checking the level of mush and then if wet replacing the transom wood. I filled a number of 3/8" & 1/2" holes with six10 and the stuff is great for that. No sag. taper on both ends of thru holes and taper the rest. I used a conical and a ball grinding bits. not 12 to 1 but adequate for the seal. It might be helpful to saturate the holes with some straight epoxy to penetrate and seal the wood before using the six10.

[Lordwrench]

The transom has already been replaced, just need to make sure the sititng in the rain for so long didn't saturate around the holes.I can't tell until I clean it up wether the holes were epoxied coated after drilling by the previous owner during the last rig.A very respected local glass shop did the transom,I am hoping they did,but I am not sure if the shop did the rig after the transom replacement or the PO.The two scupper holes are the largest,about 3/4 or smaller,the tube on the left side is cracked where they rolled the edge during installation,so they are coming out.The deck still has the original thru floor/vacuum scupper as well,so I am considering options for the transom drains.I think I may just set up some drainage into the bilge from the deck to supplement the thru floor scuppers. I will use custom mix epoxy if there's a viable benefit over six10 but of course simplicity and ease of use is nice as I have limited to zero shop space.