Recently I've been filling some voids with epoxy and I'm still trying to perfect the process. The desired end state is to minimize the epoxy that is outside the void because I don't want it to interfere with the finish I'll be putting on after the fact. I have a couple questions:
1) I've been using clear packing tape, but I don't think this is the best route as the epoxy seems to make it's way underneath. What tape do you use?
2) Do you do just a box around the area, or do you try and use several pieces to try and get as close to the edge and follow it around the void? When using the packing tape, I did this for one and it it completely masked off to the edge, however the epoxy made it's way underneath the intersection of every piece of tape. Ended up making a snowflake of epoxy...
3) For a void that goes all the way through, how do you mask the bottom? I used the clear tape and clamped a board across it, but I guess it wasn't tight enough and it ended up seeping out.