I have non-clearcoated cars and I actually PREFER single stage paint in many ways. In fact, it's USUALLY quite a bit SOFTER (easier to work) than base/clear.
A random orbital will work very well on single stage paint. I VERY RARELY encounter the need to use a rotary on it, let alone wetsand. *I* just don't seem to need the heat/speed even when working with pretty awful problems. In fact, I've cut through single stage using a PC with a pretty mild product.
Products that work on clearcoats will work fine on single stage (but the opposite isn't always true due to the uniformity of abrasives considered "clearcoat safe").
Sorry, I'm drawing a blank on "Finish Restorer".
*I* use a strong-to-medium-strength abrasive to remove water spots on single stage. Something like PI-III RC (pn 05933) with a cutting pad, followed by PI-III MG (pn 05937) with first a cutting pad then a polishing one. BUT..try the MG (05937) FIRST in case that's strong enough for what you're doing. OR use the equivalent polishes from 1Z. Do the bulk of the work with a cutting pad as it will load up with the paint you're polishing off. I haven't used Meg's polishes lately, but the DACP would be a good choice.