Just been painting my windows, and have a bit of white gloss left. Basically, if I leave it in a cupboard for at least a few months (certainly won't want to do any work before then) will it be 'good as new' or does the stuff get worse over time? It's only a fiver or so's worth, and as it's brilliant white I could get a matching replacement no prob, so will only bother storing the stuff if it 'keeps'.
Thanks,
Jon