Morning all, well here is the result and no CLUNK! although not very clear it did work to a point, as the base is rather concave the
cellotape creased and missed part of the lettering, i think it would have worked better on a flat base.
Holding the candle at an angle the flame hardly had to touch the glass, only the smoke (soot) from the candle touched the glass.http://glassgallery.yobunny.org.uk/displayimage.php?pos=-8023
Sorry about the poor photo, but you should get an idea of how it work's.