I was gonna post a reply but got distracted. As above, you need to decontaminate them.
1. wheel cleaner eg smart wheels, bilberry; ideally go for pH neutral (some acid-free cleaners are alkini)
2. remove tar eg tardis, autoglym tar remover
3. remove brake dust eg iron-x
4. consider claying the wheels +/- filling polish eg SRP
5. suitable wheel sealant eg rim wax, poorboys etc
As above, it's best to take the wheels off the car - even if it's one at a time. Don't rely on just the trolley jack and don't use the scissor jack unless an emergency.