liner for inside fender wells?, what does eveyone use Options

[stugray]

I am considering putting something inside my fender wells to protect from rocks "starring" the paint from the underside.

What does everyone else use?

I am thinking of glueing neoprene sheets (like a mousepad) to the underside of the fender with contact cement.
I have 12" X12" squares instead of large sheets.
So if one ever comes loose on the track, a small piece would not be a hazard.

I think the neoprene sheets would be lighter than a thick coating of spray undercoating or bedliner.

Next - anyone who has done this, how much of the fender is at risk?

[Mr. Olympic Blue 2 You]

Is there any reason spray on bed liner wouldn't work? I know there is a small weight penalty but seems hard as nails and you could just spray the small area needed?

[Matt Romanowski]

Is there any reason spray on bed liner wouldn't work? I know there is a small weight penalty but seems hard as nails and you could just spray the small area needed?

I doubt it would work. You need something that is going to absorb some of the shock.