chassis has deep scratches: what to do?

[choariwap]

hi,

i drive a honda city (cvt) model. I recently miscalculated and my right front wheel got stuck in some roadwork. I was able to get it out eventually but found deep scratches in the chassis near the wheel (under the axle, near the brakes).

question is, do i need to treat the scratched area with rustproofing? and if so, is there some rustproofing treatment i can buy at hardware/automative stores that i can apply myself? where can i buy it?

Thanks a lot for all your help!

[Shadetree MKNX]

That's just sound deadener, tar-like or rubberized undercoat. You can buy a spray can of that at the car supply store.

Be thankful you didn't hurt the car's rocker panel.