The company, I mentioned I was in with the ecoats was a higher end Jap company and I have no way of knowing if this is true but the engineer and I were discussing bumpers, as some of these bumpers going back 10 years ago would have a problem coating and then six months later all would be fine.
He told me that they would save their waste base colors and when they had enough ship it to a paint manufacturer and they would blend to together and tint and then use that for a coating on the bumpers.
Here again, I don't know if this is true but it costs me $250 a 55 gallon drum of waste to be hauled off, so with 10000's of gallons generated this would be a real money saver and with what he told me, I could do a 1000 gallons in about 30 minutes, so its no big labor cost.
A big paint company could easily do 10,000 gallons in 30 minutes.
Could be true or could be bull but does add up.