with a quick search on google I found one that was a brush on truck bed line - 1 gallon (says covers a 6ft truck bed) runs about $90 from JC Whitney. Quick guessing I wouldn't think 1 gallon would be enough to over all parts of a suit. Also, with the texture of the product once it is applied, I have no idea how well it would sand down to enable a second coat to be applied.
I wasn't able to find a price (quickly that is) for either Spray X or Speedliner. Most of what I saw from those was shops that offer the service.
"Can you imagine what I would do if I could do all I can?" - Sun Tsu