Looking for tips to Customs

[Sequinox 48]

Hey guys! So I'm working on my very first custom. I'm working with a brushable Rainbow Dash and I was just curious if anybody had any good resources or tips on making customs.

 

I'm changing her pose, sculpting her mane and tail, and also I'm going to attempt to sculpt the crystal armor. I know, it's a lot for a first, but apparently I have that go big or go home menatlity on this, for whatever reason.

 

Anyway, I'm currently using apoxie sculpt to change her pose and for all the sculpting. I was curious what to use as a base coat for her. Do you use a special primer or would just painting her white be sufficient? Also, what sort of paints does everybody use? I'm familiar with acryilics and was thinking about using those.

 

Any other tips, tricks, links or resources would be greatly appreciated!