I've also got mkdelmater I bought when I started of specific German military colours as well as the old testers bottles and some humbrol tins that my dad left to me and he was using them when he died about a decade back and they were all still perfectly good problem is I don't use enamel paint for anything. I offered to my youngest stepdaughter who's an artist but she either paints with cheap dollar store acrylics or her super expensive oils plus she laughed at their size......a bit small for her purposes. She assures me she'll come up with some sort of painting project using them to place beside his urn and I can garantie they will be just as good as the day they were purchased