Gum Line Decay on Veneer -- Composite Bonding Repair?

I have nothing to add to all the responses you have received.  Do the Composite!!

While not ideal, veneers can be repaired. TRY WHITENING to see if the discoloration is decay or stain. There is some discussion that you can use whitening to bleach out stain. I have had success with the combination of whitening and PATCHING with composite filling. Patching to remove the decay once you have gotten out the stain can work but you must make sure the dentist is bonding both to the porcelain and dentin with their products. Long term, we all agree that replacing veneers is your best bet but there are conservative treatments to try in the short run. Much success!