It all depends on a number of factors, how badly corroded or damaged are your wheels to begin with and what kind of results are you hoping for ?

You'll need 1k etch primer ,180,240,600 grit emery paper ,masking tape ,alloy wheel filler or normal p38 body filler depending on the imperfections on the wheel ,if they are badly gouged on the rim they would need to be alloy welded and machined or ground back as body filler cannot be used on this area .

Dipping the emery paper in a bucket of water helps to stop the Emery paper from clogging up and I also used a heat gun to warm the alloy wheel before adding primer or top coat this helps the primer bond and dry quickly to the wheel .

I refurbed my alloys and spent approx 10 hrs on each wheel and they look pretty good and still look good 7yr later, so it's all about putting the time and effort in to get good results , to put it in perspective I freshened up the wheels on my daily last weekend it took a total of 4hrs to do them all and the finish was average but a big improvement ,you get out what you put in