I second that.Believe it or not, paint you would use on your house, that is designed to last 10-20 years
Thats what I do the water based house paints seem to be the best. Bopper (Parkes NSW)I second that.
I use acrylic house paint designed for Australia's weather conditions.
For plastic I wash with dish-washing detergent, then a light sand with a fine abrasive followed by a good primer and finally 2 topcoats.
I buy sample pots from the local paint store tinted to the colours I want.
Some of my buildings are the same colour as my house because I used the left over paint, water based acrylic exterior paint.Thats what I do the water based house paints seem to be the best. Bopper (Parkes NSW)