Glassline Pens

I’m not really satisfied with the end result of a glassline paint firing...has anyone successfully reapplied the paint and refired?  I painted a pink flamingo on clear COE96, fired to a standard full fuse, it turned out splotchy in places and nicely/solidly covered in other places.  I realize the paint may not be applied as evenly as it appears after drying, is there a way to make the overall coverage more evenly covered/colored with a second application?