Always work on one rim at a time: spray, clean and dry to be sure no negative affect accrued on the rim.
1. Spray onto a wet surface, cool rim or wheel cover.
2. Wait no more than 2-3 minutes then hose off, dry and then go to another rim.
3. For heavy soiled rims scrub using a wheel brush. NOTE: Test on one rim in an inconspicuous area. If a haze or any negative reaction occurs during or after drying, do not use.