Hey there SWS! Loving the courses. We're using the Garbage Bag monster techniques to bring to life an amorphous tentacle creature. We're following the rule of not showing the monster, so we may not have a full hero build. But we need to see its effects everywhere-- really dark, slick, shiny slime. It's gunna be messy.
We're looking at methylcell. We're looking at some peroxide reactions as a foam propellant for some expanding silicon molds. But what we haven't hit yet is any chemistry or substance - homemade or prebought - to decorate locations, which will clean up easy and not leave any stain or residue. Food coloring is a pretty concentrated dye and it would leave a wall or carpet pretty stained, so we're looking at some chemical reactions.
It seems simple, but if we're borrowing ppl's houses we need to leave them spic and span. I dream of something like those oxy-clean infomertials, after the shoot you pour it on and everything turns clear and rinses away from carpet and such. Any suggestions?