Think you'd be lucky to get a turnaround in a couple of hours tbh, especially if the wheels are in as bad a condition as Rob says they are. The ones I've looked at need the wheels for a day at least, if not longer. Some do offer a hire car if necessary. Also I tend to think the quicker the job is done the more likely it is to be bodged - just my opinion.
There is always the option of the mobile refurbishers but I've not heard that many good comments about them, seem ok for minor blemishes but that's about it. I've just booked mine in to have them refurbed at £40 a wheel but with a three day turnaround time.
It really isn't a hard job to do and for anyone who knows what they're doing it won't take more than an hour or two. I refurbed mine myself with the help of my mates powder coating business and even for me, who doesn't do it for a living, I had all 4 wheels done within 2 hours. And they were perfect. Sure they maybe weren't in too bad condition to start with, I did it purely to change the colour, but it still isn't a hard job, and not one that could really be bodged unless they were a real plonker.