What's your concern?
Expense? Then it's cheap insurance compared to the total cost of building your car or having to replace it in case of an electrical fire.
Weight? Sheathing material can't be that heavy to effect either your mileage or quarter-mile times.
Sounds like a good idea to me and something I will do when my build gets to that stage.
Please post up what he recommends for sheathing material.
Thanks!
