Hi Mike
Expancel is plastic micro balloons and Q-Cel is glass micro balloons. Expancel
is easier on the lungs and sands easier especially if you mix it dry enough.
With
Expancel I start with a thin coating of resin, then wait till it gets really
tacky, then apply Expancel that is so dry that it wouldn't stick to a dry
surface.
It's just amazing how much more you can add to get to this point. Then
when applying, a heat gun helps things along, I like using spackle tools. I also
like to heat tools as well as Expancel. Best to get it done in 1 shot, so
overfilling even 3/16" or 1/4"too much is better than having to add more fill.
This mixture sands like dense balsa wood. Really goes away quick with 80 grit.
Put breeze to your back and neighbors car downwind (make sure your car isn't
downwind!). If you are low in some areas, if still partial sticky, add some
more.
When it cures for a few hours, you can razor trim a bit too. Once cured,
if a lot more is needed in areas, bite bullet, wet, wait till real tacky and
refill.
Then you will need to deal with the hard resin layer when sanding and the
not too dense Expancel. Ifonly tiny inperfectionsand slight lowareas, I like
3M Flowable putty. For deeper areas, but not worth it to refill with Resin and
Expancel, I like lightweight Rage. Really dry Expancel is a really light weight
fill. Ron P.
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