Produce aerosol paint cans with those colour changing temperature and humidity gauges on the side, thereby preventing paint 'bloom' and other nasty atmospheric induced results.-- Spooky, Oct 28 2002 holographic paint effect known as bloom... http://www.tradepar...qx/productsshow.htmdon't look at me like that... [po, Oct 04 2004, last modified Oct 21 2004] Like he said...more common effects are paint drying with a diferent finish (matt instead of gloss or satin), drying to a completely different colour (usually much lighter), or drying with cloudy blotches of colour. Not a hugely exciting idea, but useful (IM humble O).-- Spooky, Oct 29 2002 Good notion [+].-- General Washington, Oct 29 2002 random, halfbakery