The amount I had on hand and used a part of was plenty for about three boats. I had the next weight of each of them.....not the minimum weight which I listed below.
1.. The glass bubbles I would say that 4 oz. ( 1 qt. ). for $4.75 from Raka would be plenty.
2.. The hardwood flour at 16 oz. for $4.00 would do all the fillets and any extra filling for just one boat.
3.. The graphite powder when mixing it one tablespoon full to 4 oz of mixed epoxy the 8 oz. bag at $5.75 would be sufficient.
Normally I do three coats of the graphite and epoxy , each a day apart.
All of the above are the smallest amounts a person can get from Larry at Raka.
http://www.raka.com/fillers.html
The glass bubbles are used with the wood flour to lessen the amount of the flour and also to lessen the weight of it to a small amount. Both of these items are mixed to the consistency that the builder wants. Plus they make sanding the wood flour a lot easier if any sanding is needed.
Just be careful when mixing the glass bubbles in with the wood flour and also when mixing the graphite in with the epoxy. Both will create a dust when mixed rapidly so go slow with the mixing.... Mix them into the resin 1st and when thoroughly mixed then add the hardener.
Most folks after building a boat will make more of them but there are folks out there that make only one and stop , there seams to be no happy medium between the two. Remember that when you start yours to know the steps that you will be doing and that helps to save on the epoxy since the left over ( if there is any ) can be used on the next step before it sets up. There is always something that needs epoxy after you are finished with the step you are working on , even if it is nothing more then an end pour to seal the bow or stern.
