Warning!Extremely long tutorial!My fourth tutorial explains how I made the bases for Boomer and Spitter -sculptures, in hopes of helping you to create your own. Making a base for your sculpture isn't really all that hard,
you just need to have the right equipment, and know what to do with them.
I use Noch - materials in all my bases, but anything similiar will do. For references sake, I'll list all the materials I used in this tutorial:
From www.Noch.de/en/Moss, number 08600:
[link]Turf, color 1, number 95230:
[link]Turf, color 2, number 95210:
[link]Moss/Turf Mixture, number 08360:
[link]Fake Sawdust, number 08340:
[link]Fine Sand, number 95611:
[link]Grass, color 1, number 95710:
[link]Grass, color 2, number 95730:
[link] If you havent already, its a good idea to go through my three other tutorials:

Sculpting Tutorial:
[link]
Head Sculpting Tutorial:
[link]
Sculpting Tutorial, Textures:
[link]Like always, if you have any questions, please post them in the comments, and I'll do my best to answer them.
If you got something out of this tutorial, please send a picture! I'd love to see what you come up with

but you cant really "polish" resin.
Resin is a tricky fellow, even after its dry it's still vulnerable to fingerprints, dents and scratches.
If you want, you can sandpaper it at this level to reform it, but you have to apply another coat of resin to make it clear again. Anything that touches the surface of the resin (your fingers included) WILL leave a mark and make the surface cloudy. You have to wait up to 2 weeks (also depending on how much curer you used) until you can touch the resin safely without smudging the surface.
Tl;dr The only way to "polish" resin is to add another coat of it.