Composite finishing

[rodsmith]

I am looking for a good filler, smoother for composite pieces, there seems to be quite a few options and I am not familiar with them. Primer and finish coat will be Stewarts.

[jaredyates]

This is my favorite:

https://www.aircraftspruce.com/catalog/cmpages/superfil.php

[robcaldwell]

I agree with Jared on the Super-Fil. Good working time. Some of the auto body fillers and glazing compounds set up very quickly.

[Bcone1381]

Are you familiar with Micro Balloons, aka glass bubbles, mixed with epoxy?

https://www.aircraftspruce.com/catalog/cmpages/bubbles.php?clickkey=3028012

[svyolo]

Since you already made a composite part, the Easiest, best, and cheapest is just using epoxy and fillers. Like Brooks said micro balloons is as good as anything. Wood flour might be cheaper. Nothing is as light as micro balloons. It sands great and weighs nothing except the epoxy.