I have a first gen, and I wanted to get the whole truck white but it looks too white. Then I saw a phone of a truck 3/4 white on top and 1/4 black on the bottom. It looked cool but the black would scratch to easy, so I was thinking rhino line. Here's a photo but the black being rhino line, what do you think?

 

Theres no photo in your post^^^^
My duramax is rhino lined on the bottom, i like it pretty good, It looks good. The previous owner did it and he used Duplicolor which is pretty cheap crap but apparently he was really good at putting it on because it honestly looks great and doesn't chip up. make sure you sand the paint and primer (just use rattle can primer) before you apply the rhino coat.

Ive seen many people line x the bottom part and that is probably the best option but it is expensive