When it comes to paneling the chassis have people painted/powder coated/anodised them? Or just left them bare? I am considering something but wonder if it's worth the effort/cost.

Cheers

You can do whatever you like.

I painted my ally on my locost

But you can leave it bare if you want

Vinyl wrapping looks interesting, various previous discussions on here. Worth a look....

you can powder coat them too

Vinyl wrapped some and painted others. Make sure you clear coat any painting cause it is bound to chip otherwise.

I powder coated my floor and firewall and my tanks too, they look great and were not a fortune to do.