I have used mainly Herter's decoys since the 1960's and have only had to retire the few that got soaked in gasoline spraying out of a leak in an old two hose pressurized portable gasoline tank. That was a bad morning. The rest of the Herter's decoys I have seem to be quite durable with reasonable care.

Some of their largest goose decoys painted as swans work wonders on those big birds.

I have used some G&H duck and goose decoys with good success but have had a few of them crumble. I made several dozen out of a Decoys Unlimited mold that will still be around after all the roaches die.