Just a check on input points well taken.

West Systems and other builders do not recommend using 410 as a laminate. I’ve used 410 as a filler before and it does sand easier I also can put my fingernail into the finished work. A study will show that 410 used topside over glass will “bruise” such as rope burns so you may want to consider where to use it as a filler. I purchased a 15lb box of 407 at my discount, which is a considerable savings then compare that over the medium or large can single can price. If I account for my free time available for shopping, which is also money - I feel Ok with what I have. If I shopped it out I’m sure I could save maybe up to $100 if figure my time was worth it. One method to my madness is buying most of my products from one source, which leads to, larger over all discounts. I get 50% off the foam, paint, sandpaper, and other marine supplies so I like to keep my account active. So what I would save on faring compound I easily save on just one sheet of foam or roll of DA pads. In the big picture it is a bust for convenience and over all savings of my total supplies.

Once the faring is complete there will not be as much filler on the boat after sanding with the long board, but you are correct it more then I’d like. Very little faring will be needed after glassing that is why I’m fairing now. Two layers of 198-gram carbon (6.9oz) cloth make up the outer skin, not much if anything to fare before you compromise the strength of the lay-up. More care will be taken in the next side to check for farness before foaming, and a softer glue to allow better shaping of the foam.

To give you an idea on a female production mold the foam usually has horizontal and vertical scores cut about ½ way through it. It comes as a sheet of foam it also has small holes machined through it to pull the resin and vacuum through it. The resin/epoxy/bog saturates all of the holes in the foam. The bedding layer of bog is a layer that sits between the skin and foam “flat” and “upward” to fill the score cuts in the foam that expand as it contours to the curvature of the mold. Comparative to that method I’m probably not using more bog and the foam I’m using is much thicker.

Could there be less bog – ideally and as I learn I certainly hope so. I had a dilemma at one point less farness, and who would really know, or to make it fare as possible with what I had just incase I decide to pop a mold. I can go up to many production boats and even exotic cars and “side view” them and see flaws, wiggles, and wows. I did that recently with a 25-35 foot sized production multihull (this way I’m not picking on them) and I was amazed and by the workmanship it was like rollers on the beach. But most people don’t ”angle” like that perhaps it is a sickness.

Thanks for the comments,

Mike

Second thought would be to cut the frames again = but that won't happen! Part of the what I've read said don't worry get it close you can fare it out later.