First I purchased two 15 gallon galvanized metal tubs from Lowes for $15 a piece.
Next, I used painters tape to tape off any parts of the bin that I wanted to keep the original galvanized finish. I chose to do that for the handles and the insides of the bin, including the upper lip. I wrapped tape around the handles, and then I cut two trash bags open and used painters tape over the top lip of the bins to secure the plastic.
Then, I sprayed each bin with two coats of a metal primer. I used the Rustoleum Professional Primer that specified it was for use on bare metal.
After the primer dried, I used a brush to paint each bin with two coats of my base color. I chose to use a white semi-gloss interior latex paint. After letting it dry for 24 hours, I used painter's tape to tape along the ridges on the bins where I wanted my stripes to be. I brushed on my stripes using turquoise and coral colored interior latex semi-gloss. After after two coats of paint, I removed the painters tape and used an artist's brush to touch up any areas of imperfection where the paint leaked behind the tape.
After letting the paint dry for 24 hours, I sprayed both bins with two good coats of a crystal clear varnish.
After letting the clear coat dry thoroughly overnight, I again used the painters tape to mask off a rectangle on each bin. I then applied two coats of chalkboard paint... and voila!
Each bin can be labeled however they want! I think it makes for a fun way to customize their beverage bins. All in all, this was a relatively inexpensive way to customize large beverage tubs for the bride and groom.