Well I didn't say this would last forever:
http://www.rawnamerica.com/whats_new/plastipair_pr.php(Can be moulded and it doesn't seem epoxy based. Not a chemist ...)
But I know it lasts at least 10 years and even spray painted, on whole pieces of Bakelite say, not even junction lines have developed in the paint. Could post pictures but you have done so no point. This usually happens with most epoxy based fillers. But Milliput worked for you. Would be interesting to see how it goes. May not be interested, if nothing occurs for some time, in the mean time
