I'm confused again Furruri.....
1) getting my car wet..
(WHAT...! Wash your mouth out)
2) water only gets into the rear bins when the pockets above the bins have either been cut to shreds (Normally by a butcher like Sha, or the drain holes are blocked, not allowing the water to escape and then overflow into the bins.
3) flocking is used on wheels, helmets, bonnets and all sorts of exterior and under bonnet parts, so can't see how you can say it discolours, wears or looks bad after getting wet (see pictures below from 'Flocking Fantastic'