I prefer not to paint my work. But had to copy another built in. So.. I just finished a built in and part of it was a large surface on which I rolled some paint. I use a metal tray. When I was in the store they had all these plastic trays that were cheap..$1.00 or so. Sort of like a throw-away. I have had this metal tray for years. Very little rust but it takes me forever to clean-up. Are the plastic trays the way everyone is going these days? Or is there some other reason everyone is going to the plastic and I've just missed the boat on the reason. Are they really easy to clean or something? Seems to me the plastic might not be as chemically inert as metal and eak out into the paint.