I WANT TO DO THE OUT SIDE OF MY YJ IN THIS DURABAK STUFF IT;S LIKE RHINO -LINNING, BUT YOU DO IT YOUR SELF ,MY QUESTIONIS ONE GALLON COVERS 50 SQFT WILL ONE BE EOUGHT.  

no and if you can get an undercoating spray
gun do it that way it will kind of smear (the rubber stuff) if you have that flat stuff you could roll it on. i have never used it. i do use the black rubber chunky stuff on my plywood deck for my shed it holds up well. if you do use it on the outside of your jeep get the stuff with the UV protector in it. it is best to have more than enough to do the job if you have some left over prep your bumpers or something so you use it all at once.  

Todd, I am currently rebuilding a jeep and have used the Durabak for the inside tub. Seem to be decent stuff but be sure to have the extra UV protection added. I did just for the interior, heard stories about fading on interior so extra should help. The biggest thing/obsticle will be maintating consistency in color. You will need at least 2 gallons period, maybe 3 if you want it done right. You will want to keep it stirred constantly or you will end up with a multi-color Jeep. Also, do it outside, this stuff puts off an odor that will linger (and make your wife mad).