Microlight can be a little tricky since you have to mix it with the epoxy yourself. It sounds like you may be mixing it a little dry. Also make sure you have mixed it thoroughly. If you can't get it to spread smoothly, build up a little extra and sand it back. The stuff is easy to sand.

> On this hull I have tried to use epoxy mixed with West System 410
> Microlight Fairing Filler, but have not been happy with the result. It has
> not gone on smoothly at all. It tends to drag and leave a pitted surface
> when I spread it on. I can't spread it to as nice an edge as I could with
> Bondo.