inner arches yes or no

[stan laurel]

hi all.

i am new to the rc scene but bought and built a tto1e last week. i found a place outside where i can run it without being hassled but the terrain is loose tarmac and the odd puddle of water. the water i can try my best to keep out of as i realise it wont do the car any good, but the chassis and everything else was full of bits of tarmac. sorry this is so long winded zzzz.
has anyone fabricated inner wheel arches to stop all this debris getting inside the car and wreaking havoc. i must have spent ten minutes holding it upside down shaking all the stones from it

hope someone can help
regards Stan