HG02 said..
Filled in the old forward sea cocks, Temp was around 21 C when I was mixing the epoxy and all of a sudden the sun came out and the temp went up reasonably quickly after doing the sea cocks my plan was to mix in some glue filler with the residue and chase down a few spider cracks, chips here and there just finished before it started going off.
Came home for a while to do other things and went back and did a rough sand off for next weekend. Was thinking of ding a R.D.O on Friday and roll some barrier coat on but Ive decided to spend one more weekend fairing it off.
And organize a few extra days off the weekend after and take more time to roll some Barrier coat and perhaps some primer and see what it needs after that
Hi HGO2, I used the West System with 206 Slow Hardener for most of the job and only used 205 a few times for things I wanted to set fast, like when I had to glue something and had to hold it in place to set. Even with the 206 in winter time under 20 C I got caught a couple of times when I got greedy and mixed more then 200ml at the time. If you want to extend the time you mix small portions, could try keeping the epoxy in the fridge before mixing it or use 209 extra slow hardener. Haven't tried the 209 myself yet but will use it when setting the transducer inside the hull to reduce the chance of bubbles in the mix.
You probably know that already but I'll ask anyway, you did run a burr in the spider cracks to open them up first, right ? Also before you push the filler in the cracks it helps if yo brush it with epoxy first to make sure the crack absorbs as much epoxy then wait to become tacky before patching the cracks.
Also you want to wet sand and wash any blush residue from epoxy if you have left it to set before putting more on top and before you put the epoxy barrier coat. If you put a barrier coat and the previous one has already set you'll need to sand and wash it again so you'll save time and effort if you start early in the morning and do all 3 coats the same day while the previous coat is still soft. If you work on your own at 20-25C you'll probably have just enough time for a quick coffee between coats.
Also let the epoxy barrier coats cure for at least 2-3 days before lightly sanding, washing and putting down the epoxy primer. When you put down the first coat of epoxy primer you'll be able to just see the pinholes use a magnifying lens if you are like me. Use a scraper or similar to push the primer in the holes then check again when you do the second coat to see if you missed any pinholes. Once you are happy with the primer wait at least 2-3 days for that to cure properly before you roll any polyurethane undercoat as poly and poxy don't play well together.
Have fun !
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