I looked into turning the rotors on my 88 a few years back. A quality independent repair shop that also turned rotors gave me the following information;
Cars are designed to meet government requirements for fuel economy and emissions etc. Among many other factors, reducing the weight of the car helps to improve efficiency. This is done in many areas; unibody construction instead of full frame, plastic bumpers instead of steel, using the windshield as part of the integral structure of the vehicle, and also reducing the amount of material used in brake rotors. The list goes on and on.
As a result, brake rotors are often made with the minimum amount of material needed to get the job done and reduce the overall weight of the vehicle. When these rotors are turned, they won't last as long, they can warp quickly as they are too thin to get the "job done" as originally designed. For the few extra dollars, I'd buy new rotors. Just my experience and opinion for you to consider.
Also, when doing your 88 brakes, make sure to remove the caliper slider pins, service and grease them properly, and clean any gunk/oxidation from the aluminum caliper where the pin slides. I was shocked at how seized some of mine were and the effect it has on braking. Check out the bottom of page 4 on my swap thread for pics of the problems I had with my brake pads as well. All good info for you to consider while doing your brakes.
https://www.fiero.nl/forum/Forum2/HTML/122389.htmlBest of luck!