Iíve found Walberize a decent product. Goes on easy but Mother Nature also seems to reduce its effectiveness very quickly. Tried Griotís One Step as R. Cross stated and Iíve never gone back. Iíve used One Step on my cars for years, but started first using Walberize due to all the Airstreamer comments about it. IMO the two products have the same quality and impact initially, but the One Step just seems to hold up better and lasts longer.
Again, both are good. Just my opinion after using both.
2018 Flying Cloud 27FB
2018 F150 Lariat PowerStroke Diesel