+3 and you can use ZPOXY finishing resin or Bob Smith. Lots of parts like hatches and gear doors can be made by ironing on monokote over the area then applying some paste wax and then layering on your cloth and resin. Sand smooth and fill any imperfections with thinned downed autobody spot filler. lay out your part on the glass then pop the whole piece off and cut out with your dremel wheel. Presto a perfect match to the contour of a wing or fuselage.