I have used some plastic padding wood filler only to find it must have gone past its use-by date and it will not harden. I need to remove it before I can use something else, but it's on a hole where it is in nooks and crannies. It smells as if it should need a hardener, but the yellow stuff did not work. I new need some kind of solvent. Any ideas?
How odd. Never seen that before. Oh well.Acetone or cellulose thinners should get the unhardened muck out..or try brushing some NEW hardener into what's there.
I have seen resin fail to set in any normal period of time (hours to days) due to 'gone off' hardener/catalyst - but eventually go off. Depending on circumstances, time might come to your assistance.
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