I have used Martin Senour a few times. It worked O.K., its not Centari! For inexpensive alternitives I have had good luck with Sherwin Williams 2nd dimension for single stage, or Omni's single stage, & Dupont Nason acrylic enamels. I have also used Sherwins 4th dimension and Omni's bc / cc systems as well, & had good luck. Used to use allot of Western but not sure if you can still get it as Sherwin Williams bought them out.
As far as tips / advise. I would say if you are going with metalic and plan to wet sand / buff dust, or flaws out go with bc / cc. If you are not looking for metalic single stage might be the better route. Single stage is more forgiving when it comes to flaws in old paint or less than perfect prep work.
How much work does the body need before its ready for paint? Is it a scuff and squirt or do all or most of the panels need work? If it only has a few small repair areas you don't need to prime the whole truck, just the repairs, used a self etching primer, these actually bite into the metal, & help prevent rust. Plus a high build urethane primer, urethane primers, one coat is as thick as three to six coats of laquer primers, and they don't shrink a few months after paint is applied leaving behind sand scratches. ( laqure primers are mostly talcom powder ) If you have allot of work priming the whole truck might be better.
Use 3M tape not the cheap crap, and masking paper not news paper. News paper is O.K. two or three layers thick for spot priming but thats all.
Feel free to ask more questions, hope this helps.