The Low-E coating had failed and began to oxidize causing a metallic "cloudy" look which the buyer's asked to be replaced. 

 @Joel Owens,Don't hold back, Don't sugar coat it.

Option 3) Finally, it has crossed our minds that perhaps it would not be a bad idea to do flip for our first deal on a home that needs basic and minor cosmetic updates (new coat of paint, laminate floors to replace carpet, updated appliances and cabinets perhaps).

The thinner granite countertops have a thicker edge fabricated onto the front to make it look like a thicker slab.

Usually 1 or 2 coats of kilz or zinsser will usually do it.

The ceiling beams was spray painted black.There was an odor still coming into the house so it was suggested that we had a rodent issues and to remove all the old fiberglass insulation in the attic and put cellulose which is coated in borax to deter animals and help insulate the house.

One word of caution though, the tenants cannot put a bath mat in the tub after it has been coated.

Where did he get it I am picturing a guy standing on a corner with electric meters in a trench coat. 

Guests tore up my Tramontina ceramic coated with steel utensils and the Henckels can take that abuse.I have been buying small soaps and shampoo's from Amazon.

I once painted a condo using cheap paint. 5 coats later...