1. Colour (and flavour) go into the syrup. Add some acid to punch up fruit flavours.
2. Carnuba wax is used dry but can cause spotting (certainly did last time we tried it) - less spotting when combined with beeswax, which is softer and fills in cracks better, used 3 parts beeswax to 1 part carnauba. We decided next time we would put the powder in the empty pan - spin and heat to deposit it on the surface - then put the rehydrated jelly beans back in to see if that would give us a non spotty finish.