has anyone done one? what, how much and where did you get it from, lastly is it any good ( would you do it again?)

I have gutted the inside of my troll, (filled it up with muddy water and crap was fun at the time ), any way I found some surface rust and a few pin holes and a bloody big hole needs a plate about 65mm across, so while it's empty....... I was thinking after I do the repairs, that I might look into a spray on type ute liner under the carpet and get rid of the felt, and put some rubber matting in under the carpet also.

any thoughts and info is welcomed

thanks

troy