Need some help with fairing, etc.

[KenB]

I never really understood why you would use the microballons over fibers or cellulose.

Cellulose is super strong, much easier to work with (i.e. it doesn't go too airborne when mixed) and also is a super handy clean up tool... if you have epoxy on your hand just stick your hand in the cellulose bag and do the "hand washing" move and you should be all set. Plus cellulose (for example bought from progressive epoxy) is super cheap. Like 10% the cost of either quick fair or mircoballons...

So what am I missing? Harder to sand? Gums up sand paper more?