Stripping wheel coating?

[raysaint]

The new car we got last November, as part of my before winter detailing, I Iron-X deconned the OEM rims, cleaned with Brakebuster, and then applied one or two (I forget) coats of 303 Spray/Rinse sealant. That was mid November.
By mid to late December, the wheel assemblies were removed for winter tires.
So the 303 has only had 4 or 5 weeks of driving before winter.

So before putting the OEM assemblies back on, I bought some Gtechniq5 to coat the rims (the oem rubber will be removed, rims coated, then new tires). Do I need to strip the rims first of any remaining 303, and if so, how? (special soap, eraser, etc.) Or will the coating adhere to just a clean rim?

I attached a pic of the car after my November detailing.