Welding frame

[skid jackson]

My upper exhuast mount bolt insert broke free from the frame. Guess the original tack weld did not cut it. I plan to have a welder tack it back into place. any technical tips on what they should be using as far as type of welder, rod/wire etc etc. for chromoly ... the frame is chromoly isn't?? How bout frame prep?? What should I spray the area with after, regular black metal paint?? Frame is powder coated isn't it?? 06 300 btw. it will be a mobile rig that shows so I want make sure the dude is carrying the right stuff.