Be sure and make your veneer out of the official BSA block
After reading your rules, how much sanding of the wheel do you think is OK? Wheel weight out of the box is 2.6-2.9 gr. ( yep, 2.9 for some Chinese wheels)
Now if i sand those imperfections down, I think I can leave the rolling surface looking like it was just lightly sanded, but my wheel weight might drop to 1 gr. Your rules do not say how much the wheel must weigh. What do you think is allowed? A 1 gr. wheel will give you almost 3 car lengths advantage.
If you want a wheel that looks super normal, but has the imperfections carefully removed down to 1.8 gr, it gives you 2.5 cars advantage.
If you go this route, bring extra sets of wheels not lightened in case they make up rules on the spot to disqualify you.