anyone have tips for working with polyester resin?

[justsomeguytn]

I made one small batch of pieces, three small cabs and a crystal.  But I think I put in too little catalyst and it's still sticky three days later.  I had tried to keep air out with kling plastic but it doesn't seem to have made a difference.  I've done a new small batch with triple the catalyst I used originally.  I'm waiting for that to set up now.

[justsomeguytn]

Ok more catalyst does seem to help as well as coating the exposed surface with clear nail polish once its nearly set.  But I still find myself wishing for better results.  Maybe I should leave it in the mold longer.  Right now I'm leaving it in for about a day.