We have fair amount of quality paint from various manufacturers leftover (bm aura, natura, sw products, ppg products etc and wondering if would be safe to mix and use for priming stucco which we have often here in Florida. Mostly use ppg permanizer for stucco prime/paint so could make sure high percentage ~30-40% is that product. Any advice is appreciated, and would use on friends and family homes most likely so no worry of repercussions necessarily. Perhaps there is a bonding agent etc that we could add to help. I'm thinking there perhaps is a way otherwise what happens to the paint that is dropped off at the hazardous waste disposal and I assume goes into a recycling stream.