Are these pots one of the good high end brands, or are they some of the made in china types?
I know that Le Crueset has a lifetime warranty on enamel stuff if you're the original owner (no idea how they'd even check). I would imagine that Staub does something similar.
The discount brands (and even Lodge has the enamel done in China after the pots are cast in the USA, I think) probably don't stand behind them at all.