you can't relic a poly coated guitar.
it will look like crap.
1) you can't check the poly like nitro
2) you can't wear the poly off using sand paper etc etc, you will burn the wood underneath before the poly sands off. You will find burn marks after u use a heat gun and strip the paint off.
3) fretboard/neck is poly coated, it won't age like a nitro board, you will never get to the wood.
The poly is there for a reason, to protect against scratches/wood chipping/wood damage.
The only thing u can 'relic' is the hardware.