I have not used AeroPoxy Light but based on it's description it seems similar to something I have used called SuperFil. Have you tried it? It is a two part epoxy based set-up with lots of filler. It's ratio is 2:1 and they recommend weighing or measuring each part and not just guessing.

It has the consistancy of frosting for a cake which may be thicker that AeroPoxy Light. Superfil can be put on thick or spread thin to fill weave. It can be VERY easily sanded. They only drawback is the cure time. It's not like Bondo that can be sanded in 15 minutes. I usually wait overnight before I sand. It is intended where you need to fill but weight is of primary concern.

After sanding, pirmers stick very well to it and it does cure hard. You could make a mark in it with your fingernail but it is "solid". SuperFil also notes that it is NOT intended for structural bonding, just filling. I hope this helps.

Doug

You may also want to consider West Systems 410 Microlight filler. You can add it to any brand epoxy and depending on how much you add you can get any consistency you want from syrup to peanut butter.

If I am trying to fill the weave on a flat surface like a fin I'll make it very thin and brush it on. If I want to do a fillet I'll make it more like frosting and use a spatula.

Either way, the curing time is still based on the epoxy you use. It sands easily even when only a small amount it used.

Doug

I hope this helps.

Doug

It does indeed - many thanks! BTW, you should have something on your doorstep today...