Rear star is easy, just use the proper torx bit with the rear doors open.
You'll see it when you get the van.
I used spray primer and a rust oleum spray Bedliner for the rear. Masked off the back of the assembly and primed and painted.
Easy and has held up well.
I attempted to plastidip the front, no luck.
I attempted to remove the grill, no luck, all the clips felt like they were going to break.
So I have the ugly plastic chrome star still on the van.
I removed all the plastic "sprinter" "2500" and bluetec emblems off the van, so all that's left is the front star.
If I had a new van coming to the dealer, I'd require them to remove the front star before delivery. I'd drive the van home, paint the star, and pop it back in.
You may be better at disassembling plastic auto trim clips than I am.