I am making small plaster molds. I don't plan on painting over the plaster with paint. What would be a good seal to prevent plaster dusting off or dirt getting in the pores? This is for jewelry. Will shellac or mod podge work fine?

THIS IS WHAT I HAVE. PLEASE ADVISE ON WEATHER IT IS OKAY, OR WEATHER TO ADD MORE, DESCRIBING WHAT TO ADD. THANKS.

ASSORTED PLASTERS
PAINKILLERS (IBUPROFEN)
BANDAGE
SAFETY PIN
POCKET HANKIES

ALL ARE IN A MINI PLASTIC CONTAINER. ALL MEDICAL SUPPLIES ARE A GOOD BRAND. THANKS

I have a beautiful soft plaster donkey, 3 ft long 2 ft hi, with a cart behind it, out in the front garden, a gift from my children. The rain has taken it's toll on the paint of the donkey. I did purchase some exterior craft paints to touch up the spots then I sprayed it with several coats of polyurethane. However, continued rain, even hail a few weeks ago, pitted the surface exposing the plaster. What kind of paint can I use to protect the plaster and what coating or spray should I use to protect it overall? Thanks.
Thanks for the tip Precious Gem. It makes sense that whoever made it didn't seal the plaster before painting it.

I want to make imprints of my niece's hands and then paint them and have them and have them fired at a local "Paint Your Own" craft store.

I called the store, and the woman I spoke to said she fired all of her pieces on 6. I'm not familiar with Pottery Kilns and I don't know what type of clay/plasters, can withstand being fired on 6.

I want this to be a nice looking imprint, not just your regular "Plaster-o-Paris" painted print.

I need to know what type of material to use.

I also welcome any other nifty ideas! Thanks!

i make an art project where i take vintage jello-tins & fill them with plaster of paris then take paper mache & make cupcakes (see me on etsy store name: chinamommy). i'm having trouble with the tins getting tiny holes & then oozing grey "gunk"... any ideas what i can do to fix this problem?? thanks!

What would be an easy/ interesting/ affordable way to display a large, (over 100), collection of hockey-pucks. I'm thinking of a shelf made of of some type of L shaped trim moulding with a grove notched in the inside for the puck to rest and the opposite side attached to wall. I'd like to make it easy for people to pick them up and examine them. The display will be surrounding a game room in basement with plaster over concrete-block walls.
Any ideas?
Thanks!
-pik'

not an online store...but a store that I can take my kids to so to, and they can pick out something they would like to paint themselves....please help!