
Anyway, it got me thinking

My idea started with one of my guitars, which has an awesome green painted and varnished finish where you can still see the wood grain. It looks something like this:

I was thinking it'd be really cool to do custom wood inserts somewhat like the above, but with a black varnished finish, more like this bass:

A little googling turned up a steering wheel with the same look and feel I'd be going for:

I have a bit of experience building random things, like shelving and whatnot here and there, as well as working on the car of course, but basically no experience on painting/finishing wood. Is this look hard to achieve? Would I be better off buying some used wood inserts and just trying to refinish them, or cutting my own wood? If the latter, is it easier re-creating the stock dash insert shapes, or to do the one-piece wood dash that goes all the way across?
Thanks in advance for the help and advice!