It depends on what consistence of fillet you want. I make mine about the same as some good peanut butter.
I do it differently then most folks ... I add the resin to my mixing pot , then the wood flour and mix it together when it is like really thick bread dough and wants to glob up then I add the hardener and mix it up so it where I like it. Sometimes I need to add a spoon full of flour to it if it is to runny. Runny is not a good thing and so is to stiff of a batch , it' needs to be like the porage Goldy Locks ate ... just right , so it can be spread and not run on you.
Again.. If you brush on some epoxy , each side of the seam , let the epoxy cure , then lightly sand it. Then put down some tape and do the fillet between the pieces of tape , Don't forget to pull the tape when the fillet starts to set or the tape will be part of the fillet.
"O" the reason for the epoxy on each side of the seam .... It gives the tape something to hold onto plus when you pull it it will not pull any of the wood with it , just comes up slicker then Owl poop.
I know more work and preparation is boring and a pain but it is the key factor in having a boat turn out the way you expect it.
Chuck.
