It’s hard to believe that it makes sense to “repair” a slab with extensive and continuous damage. If you’re thinking about a conventional “patch job”, you’re right. You’d never be able to justify the time for prep on dozens or even hundreds of small areas much less apply the repair in small doses. You don’t need to repair this slab, you need to “resurface” it.
Resurfacing is a way to make many repairs at once. It allows you to restore the slab without all of the detailed work of a smaller repair. Of course, you’ll need to consider a new class of materials to get it done. The good news is that most of these materials are as easy to apply as the patching items you’ve read about in previous emails.
Take a look at a guide to selection of the right resurfacing material for your problem slab.