Poorboys Wheel Sealant is very decent stuff and I used it for years (on gloss black wheels) but, it can be a real pain in the @rse on black wheels. It's pink which in turn goes white on drying, so if you miss any whilst buffing off, which is much more easily done that you might think, it's very noticeable on black wheels and it's all too easy to get the residue in wheel bolt covers which is a pig to get out and needs teasing out with toothpick or similar. Also Poorboys has to be worked quickly as it dries quick so not a long hazing time, and if any part of the car is in the sun then you have to work very quick! Otherwise it's a lot of elbow grease to buff off and that's when you get the unwanted residue appearing.
Much better to use a clear wheel sealant imo for black wheels. You could of course, go the major route and coat your wheels with the likes of Gyeon Q2 RIM, Gtechniq C5 Wheel Armour, or CarPro DLUX. They all really need to be applied to wheels off the car, and need time to cure.
If you are looking for something to be applied as wheel protection fairly regularly, say ever 6 weeks, then Gtechniq C2v3 works very well on wheels, as does Sonax BSD (Brilliant Shine Detailer) and other nano sealants. I've haven't coated my wheels but instead use C2v3 every 4-6 weeks and find it excellent, easy to apply and buff off, quick too so easy to get a couple of coats on if desired, and the wheels are very easy to clean each wash with a quick pre-wash spray of ValetPro Bilerry Wheel Cleaner (diluted at ratio 1:8 or 1:10) or WoWo Wheel Cleaner(pre diluted) ato loosen dirt, then washed with shampoo and wheel woolies/wheel mitt.
So my advice is to look at a clear sealant for your black Prets to avoid that annoying white residue that Poorboys leaves behind and for equally good protection and much easier application and buffing.