Here are some things to watch out for when using a cap mold. First, you have to be very careful when using it to make something fragile and heavy, such as bottles or bowls. Second, using plastic caps rather than screws or other supports could potentially destroy the design that you've already put together. Lastly, using the cap mold to support parts of your sculpture could result in damage to those parts, causing them to have an unstable fit. You could also risk the chance of having parts of your sculpture collapse if it is too weak to hold everything together.
One thing that you should know about cap molds is that they are not the same thing as resin. Resin is a very thick liquid that has to be melted and poured into molds. It then hardens into the shape that you want, creating the base of all sorts of sculptures. Plastic cap molds are simply powdered resins that can be poured into a container, poured into a mold, and then hardened again before being used to make dice or other objects. This means that you don't have to melt and harden into a solid substance in order to get a decorative sculpture, but you do have to make sure that you're getting the right consistency with your material in order to get the results that you want.