Quoting Nellster McBricks
So, what counts as custom?

Quoting Jamaal Blanchette

Hi Nellster, thanks for joining the group!
what counts as custom is anything from taking apart a minifig, and replacing its parts from other minifigs, to anything like making your own decals, hairstyles etc. What you do to customize it is totally up to you (for example, painting a helmet)

Also, the same applies with accessories.

Hope this helps, if you have any more questions/concerns, just reply back :)

-JaMaaL

Quoting JWG 258
Hi all you. I like to make my own weapons and things for minifigs out of non-LEGO stuff, like bits of wire and hardware. Ive just started learning how to make decals and stick them on.

Quoting Jamaal Blanchette
cool, i also use non-LEGO stuff, such as the "weapon carrier" i used for my Proton Custom minifig, check it out! :)