The mold on the outside of the cork is harmless. Just wipe away. It is possible your bottles were heat damaged but if you kept them in closets and the temperature didn't get much higher than low 70s, they may not be damaged but just advanced. A musty smell is not necessarily a sign of heat damage. A sticky wine residue under the capsule is one sign of heat damage. Another sign would be if the color of the wine is brownish and dull looking. And finally if when you taste it, the wine lacks fruit and is dull and tasteless then it is most likely heat damaged. I have not had the '87 Mouton but the vintage itself was not very good and quite backward. I would try decanting the next bottle for an hour+ or doing a double decant a few hours before you take it to the restaurant. The mustiness might dissipate. I would be very interested in finding out the results of your next bottle if you do decide to decant. I also would not waste my money on buying any product that claims to restore corked wine. It's not going to happen. I've been to Blu once recently and I was not overwhelmed. Some dishes were very good but they had a very heavy hand with the salt on others. This was a pretty busy Saturday night. I need to try it again on a slower weeknight. I did think the service was excellent even though it was very busy. The waitress did an excellent job of opening and decanting my 1975 Chateau Palmer. I am usually afraid to give waitstaff older bottles of wine as the corks can be fragile. She was gentle and took her time even though the place was hopping. Best, Paul