A couple of notes - we have no idea if the Revel Performas in the OP are brand new or 5 years old. Are they second hand?
Warranties often do not cover speaker finishes as the manufacturer cannot control where or how the speaker has be used. Sitting in direct sunlight?
Remember, your dealer does not set warranty conditions, the manufacturer and distributor in your country are the parties who have some control in this area. The dealer should assist with any problems but if you have purchased your speakers from across the country, then is the problem from shipping? Then you have to ship your speakers to be fixed - but where do you ship them? The dealer does not have a wood shop to rebuilt cabinet finishes.
Another point, often speaker cabinets are made in China, or Poland or Portugal whereas the rest of the speaker is made in Denmark or Germany or the UK. If you try to replace one speaker cabinet, it will, for sure, not match the other speaker cabinet which might be years old. Wood veneer fades, colours do not match when made in a different batch.