This is her explanation from the old thread...I 'll post a link in a minute- it may have some other info you might find useful- it's several pages.
I use Delta Ceramcoat
Gloss Interior Varnish. I've never used paint pens, but it does not make my acrylics run. For some reason, I have had colors run (black/white) when I use the Satin Varnish and the Matte Varnish. Strange! The Delta products also have the AP rating which is important when making items for kids. I have not been able to find a spray gloss with that rating. It would make things so much faster! http://hipgirlclips.com/forums/how-m...so-smooth.html