The policy is:
Wheels and wheel trims Dents and holes on wheel rims and wheel trims are not acceptable. Scuffs totalling up to 50mm on the total circumference of the wheel trim and on alloy wheels are acceptable. Any damage to the wheel spokes and the hub of the alloy wheel is not acceptable. The spare wheel (including ‘spacesaver’), jack and other tools must be intact, stowed properly and in good working order. The emergency tyre inflation canister, if supplied when new, should be in full working order, serviceable and ready for use. A canister that has been partially or fully discharged should be replaced.
Taken from here:
http://www.drive-electric.co.uk/wp-content/uploads/2016/05/Fair_Wear_Tear.pdf
From what I've seen and heard, when sending a car back and the vehicle get's 'appriased' be careful on what gets noted, if you feel that something is written down that's not right, refuse to sign the paperwork.
Personally I'd look at maybe getting a localised repair on it as suggested above, no point in a full alloy refurb, it's just costing you extra money for nothing. At least you'll know when handing back the car all is okay.