I decided to mold and cast myself a forest.
As with most things, there are trade-offs. Both products worked well for my project. Amazing Mold Putty is faster to use while Amazing Mold Rubber gives you even more detail. You get more overflow of resin with the putty, but the rubber needs a container to pour it in. There are videos and written how-to instructions at the Amazing Crafting Products site that can help you decide which is the right product for your project.
For the Amazing Mold Rubber, I lined the lid of a plastic watercolor palette with aluminum foil and glued down the tree shapes (using Miracle tape) so they wouldn't float to the top. I mixed Parts "A" & "B" of the rubber, stirred and poured it in. I used the whole container since I had so many objects to cast.
My watercolor curled up a bit, so the Amazing Mold Rubber wrapped around the trees and I had to dig a bit to get them out. The mold looks a bit shabby, but it works a treat!
For the Amazing Mold Putty, I mixed Parts "A" & "B" together into a ball and flattened it out, then shoved the trees into the putty.
To cast the trees I mixed Parts "A" & "B" of the Amazing Casting Resin, making enough that I could cast both the mold putty and the mold rubber at the same time. You can see a Popsicle stick under one of the molds. That's another difference between the putty and the rubber. I didn't use quite enough putty to get a good dam at the bottom of the tree. Easy fix though. I just needed something to prop it up a bit, and it was good to go.
The resin set up in a about 15 minutes, though it takes a few hours to be completely cured. I popped (or pulled) out my trees and immediately trimmed them, and cut out a few areas where I wanted the tree limbs to show. Trimming, cutting and sanding should be done as soon as possible while the resin is still slightly soft.
I used metallic acrylic paints in yellow, magenta and cyan to add the color, and my forest was finished!
the forest for the trees?