Hey Omega_Magnus
Here is how to take Primes front rims off.
To remove the front rims on Prime's front wheel:
1. Heat both end of the middle pin.
2.Use a nail or thin screw driver tip to push out the
pin from the middle of the rim.
3. Use pliers to pull the pin all the way out.
This is some what tricky that is why it is best to start with a junker so you can learn the ins and outs of taking Prime apart.
Watch out for the springs on the inside of his legs.
When I first try to repaint a reissue Prime I failed
so it is a process and I hope that you nail it on your first try man.
The KO Primes are much easier to work with, plus
you have all the parts and unused stickers for the trailer.
Let me know if you need any help.
Good luck

Keith.