Has anyone tried this grain filler?

I'm actually using it right now on oak to smooth out the grain before topcoating. Seems to work ok, I needed to use more than 1 coat to get it really smooth. Used it after staining. Mark

I use it on bowls that have coarse grain. I never use stain so can't comment on that. I sand to about 220 blow it off and wipe in the crystallac using a gloved finger. When dry I start sanding at 220 and go from there. It does clog sandpaper, but often is easy to remove from it using a soft wire bristle brush. The wood finished this way seems to have a lighter color than if no filler was used.