I really believe with the majors, its the jobber that makes all the difference.
I have a friend who is a jobber for a major that people bitch a lot about and his favorite saying is I will have an answer today or I will be getting a big wig out of bed tonight, with a phone call.
Of course some companies, like the tape answer, I posted are just plain losers and will never help anyway, the guy in customer service was smart as he asked if he had any unmixed base left and when the guy said no, that is when he said the tape deal.
My answer to the guy was, well you don't really want to hear but in short I said go buy PPG, Sikkens, Prospray or BASF.
That was a very loyal customer that company lost and I will put money down, that he will never buy an item from them again, yet all they would have had to do, is say, got a batch problem, get a new gallon on us. How simple is that, just tell the truth and replace? HUM.