I've found that for the size molds I make, scooping or pouring the Base was too messy and wasteful, so I now pour the whole container into a squeeze bottle, (like you'd use for ketchup). This works great, but it's difficult to clean up the funnel afterwards. This stuff is amazingly sticky - any suggestions for cleanup?
You can clean up the unmixed sides using rubbing alcohol. Or de-greasing wipes (like Lysol wipes) works great for me. I've seen sanitizing wipes also work fairly well too. If it's already mixed, the easiest way of cleaning those up are to just let it cure and peeling it off. Great idea to use a squeeze bottle, I get the 10lb tubs of Plat 25 and the 5lb tubs of HS-3 and I use small metal serving ladles to dip them out of the tub without making a mess.