I have been battling getting a decent picture. part of it was the onsrud 60 bit was just not doing a good job of fine lines. I bought one of the simple v carve bits from http://www.centuriontools.com/3fldsr.htm
and it sure cut cleaner then the onsrud bit. getting a decent picture is hard too.
this is on some of that white bathroom panels that is hardboard under it. got to use a vacuum to hold it down it does not stay flat.