Not happy

Today a chap turned up and repainted our letter box. When I said will you be putting a Wet Paint sign up he said no not needed as it’s dry in 15 mins. About an hour and a half later our postman emptied the box and got covered in paint and he was not happy (as Able Seaman Johnson would say).....I mentioned the quick dry paint and he said.........that look at me! (Expletive deleted).