I don't know about the '02 Tundra but my '05 Tundra DC LE has wood finish inserts that are plastic. They look real enough until you get scratches. My recommendation is to not sand these down but to take them out and replace them. I've heard of people sanding down the plastic behind these overlays and painting them but to me, thats a bunch of work for high-risk because these areas can scratch very easily and a good paint job is foiled with the first scratch.
Take a look at these guys...
Wood Dash Kits, Dash Trim Kits - WoodDash.com
Pricing is reasonable and they've got a lot of choices.