Catchy title should get results??

No wonder I have a hard time I can't even spell armor in my title...
Anyway I have looked through lots of old post and didn't see anything on the Liquid Body Armor by Fat Man. Have any of you had any experiece with this product? I was planning to do the inside of the cab, under the fenders etc. Then follow that with mat in the cab.
On there site it says something about an airless sprayer which I don't have so I'm trying to figure out what I can spray this mess with also. The only thing I have now are nice paint guns and a cheap primer gun with a 2.3 tip.
Any advice would be great! O- and the reason I was looking is the cost is 39.99 per gallon from noise-killers on ebay! Not bad compared to some of the options I guess.