hippo liner advice and pics please

Has anyone used HIPPO liner on the underneth of their car? I was at the body shop today going over colors and for the last 3years i was set on having under the car sprayed the same as the body.Well long story short he STRONGLY suggested we use hippo liner.He said he'd do it(spray body color) but now wants to put on a jig.MORE$$$$$$$$$$$$$$$$$$$$$$$$$
ANY PICTURES OF HIPPO LINER APPLIED WOULD BE A GREAT HELP!!