I recently used one for the first time to do some back box touch ups, came up ok considering didn't spent a whole lot of time in prep work etc, i used to retail this stuff, not the cheapest but very good quality, hes local, only deals in air bush stuff compressors & Accessorizes only, hes a one guy operation, so he knows what he taking about, he also goes to all the main model shows & does live demos etc,

  http://runway13.com/store/   hope admin is ok with link