Yes, you need to fully clean the alloy wheels and the tyre wall itself.

I use the following to clean alloys:

Meguiars Super degreaser
Rinse
Iron X
Agitate using wheel woolie
Rinse
Meguiars Tyre Cleaner on alloy and tyre wall
Rinse
Tar remover for any tar spots
Rinse thoroughly

If you are to apply any sealant, I would take off the wheel and do the inside rim as well. If the alloys are in bad condition, I may also clay them as well.

You don't need all the above but you should get them as clean as possible first.

There are some good videos on YouTube on cleaning alloy wheels.

PM me if you need any more info.



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