TTI Dougs with black finish

Getting ready to purchase a set for the stroker. Parts guy says don't waste my money on a street stroker 470HP and just go with stock 340 iron. I had ceramic coating before and they sucked due to rusting. Warranty worked but the change over and return boxes also was a big pita. Some say the iron will really restrict my stroker? So I was wondering if anyone has ordered TTI or Dougs with a black coating which if ever started to rust, can then be touched up with a high temp exhaust paint? Any pictures out there? Thanks