Thoughts on resins and pigments?

hello all,

i just signed up for orchid again ive been off for a while, could
anyone give me any helpful hints/suggested readings on working with
resins and pigments? I would like to start using it and im not sure
where to start, i would like one that doesnt yellow, i want to dye
it, is polyester better than epoxy??? should i order something just
for jewelry or could i use the kind for boats?? Any helpful hints in
the right direction would save me some time.

thanks in advance
heather