Leah, Use a metal primer first then you can paint on them with acrylic
paint. Use a good quality acrylic. After you finish, spray on an acrylic
spray. They should last a long time in the weather.
Hope this helps, Margaret in GA.
From: artappeal [mailto:firstname.lastname@example.org]
Sent: Wednesday, August 14, 2002 4:21 PM
To: ArtsEdNet Talk
Subject: painting on metal
Hi! My principal has asked if my 5th grade art club would paint some
garbage cans for a local park. I said yes because my club loves doing
public service projects. However, I'm not sure how to paint the cans so
they will last in the outdoor elements of southwestern Pennsylvania.