Have you ever had a resin take a full 72 hours or longer to set?
Mine are almost always fulled cured within 36, even though it says it may take 72.
If it hasn't cured fulled in 72, does that mean it won't set at all?
It doesn't leave impressions to handle it, but you can poke it with a toothpick and it leaves impressions. It's been 48 hours.