An idea worth considering RGP.... not much material to drill into given a 'stout' mushroom would be needed, but will have an investigative look...
Aye Steff, your welding sounds like my painting, can never see why I shouldn't put 5 coats on at once and save time. Missus goes mad, everything (inc adjacent walls, carpets, curtains etc) about the house used to be a stipple finish - but hey, big result, she does the decorating now. Yahoo!