If you really want to go all out, Acer sells full ceramic kits for Arrma's. TRB RC may as well, IDK. Kraton 6s..I use TRB RC ABEC 7 hybrid ceramic bearings for the wheel bearings of most all of my 6s vehicles (two Arrmas and two Corallys). They aren't cheap, but they are higher quality (tighter tolerances) and less likely to get damaged by water. I'm not hard on my 6s vehicles, but if required, I will replace the stock bearings in the drivetrain with hybrid ceramic bearings.
https://www.acerracing.com/products/arrma-kraton-ceramic-ball-bearings?variant=37991043858622