If there's differences in elevation, it sounds like you scarfed them a hair
too long. It's much easier to hide the joint if they're a hair too short.
When they're long, the only way I know to fix it is sanding them flush. Be
careful not to soften (or round over) the sharp edges of the crown profile
itself when you're sanding across the scarf joint.

jc

wrote in message
...
I just put up white crown molding. I used angled (45 degree) scarf
joints where two pieces meet along a wall. I matched the joints very
carefully but slight differences in the elevation of the two sides
seem magnified. I've tried caulk, wood filler, and lots of paint, but
the joints still seem visible. Is there a trick I am missing?

Thanks,
Tim