Anyone have a recommendation for a bed liner or undercoating for the exterior?

 

For undercoating i have always used 3m rubberized in a spray can,Prep is the key to anything like that.What i do is clean the places in painting if it has rust then treat it if not just cheapo spray paint once its dried then undercoating over it.Undercoating is best to only use on the under size of floor pans and frame rails anything else under the jeep just use whatever spray paint you want.Using bedliner for undercoating some people have but i wouldn't it has no sound deaden and can take things pin when they bounce off the floor pans.On a jeep only place id use bedliner is on some of the body panels as armor.I have used monstaliner as a truck bed liner before its roll on and pretty good to me.Its been 4 years and still looks good with no pealing.And it comes in a lot of colors so anything you can want they got it probably.