Cleaning:
As stated, this is a water-based dressing which means rubber prep is critical. Use a strong tire cleaner such as Duragloss White Wall Tire Cleaner, TUF Shine, or even Griot's Garage Rubber Prep. If solvent based dressing has been applied or is present, a couple applications may be necessary to remove all traces. Once your cleansing process reveals only white foam, the tire is free of build up.
The use of APC's is ok but know that they typically leave a little something behind. In this case the use of a scrub brush and water should rinse away APC residue.
Dressing Application:
Meguiar's Hyper Dressing is a water based dressing that is intended to be diluted with water. Once the surface has been thoroughly cleansed, dilute the dressing per desired output. To achieve the high gloss shine, dilute 1:1 (1 part MHD : 1 part water) and spray applicator and swipe or spray tire and swipe. To save a little time you can apply over a wet tire but be warned the dressing will be slightly diluted upon application. A second application may be necessary.
Additional Info:
Each tire is made of different compounds. Tire dressings react differently to each compound, meaning not all tires will look the same when dressed with the same dressing. Water-based dressings appear to soak in differently with each brand/make of tire. Some react well with the dressing leaving a beautiful sheen, some repel and leave splotchy appearance. There are times 2-3 applications will be necessary to achieve a uniform look. This cannot be blamed on the water-based dressing, it is just the nature of the beast and we must be prepared to address the situation.
There are times that tires simply will not accept a water-based dressing. For these times it is a good idea to have a solvent based dressing on hand. To reduce sling with solvent based dressing, it is best to apply to an applicator then apply to tire. Always give the dressing time to "soak in" and wipe with a dedicated tire towel to remove excess dressing from fins, grooves, and edges. Never attempt to settle with just one product or you may find yourself let down from time to time.
Best of luck,
- Richard