I emailed the TC Ceramic people and got these;
If sprayed with a airless sprayer, yes, it will have a smooth finish.
> First of all let me apologize for the delay in getting back to you.
> TC Ceramic has one of the best binder systems on the market for a product of this type. It will adhere to just about any surface and stay for years. The one thing I would caution you though is that if the surface is fairly slick, it may be a good idea to scuff it up a bit before applying our product. Other than that, clean and dry is all you need. A simple pressure wash and dry and the apply.
> AT 15 mils of thickness (15/1000 of an inch) which is all you need to block 99% of solar gain, you'll get about 60 square feet per gallon. It cost $49.50 per gallon and to do the roof it would take about 8 gallons. (considering that this is a normal size bus) We sell our product in 5 gallon containers.
> If there are any other questions I can answer please let me know,
> Rich Kraft
> Capstone MFG., LLC
> 18225 47th PL NE
> Seattle, WA. 98155
> skype: richkraft