Chalkboards and Chalk Paint
A big, big fan of chalk paint. It goes on pretty much any surface in one coat, it looks good smooth and sleek, chippy or distressed. Basically it is quick and easy to use to transform and upcycle or recycle a whole heap of stuff.
Take these frames. I bought them from a Brocanters market, 10 for 10 euros, cheap as chips. Gave them a range of shades of chalk paint and voila they look right on trend.
Filled them with ply painted with blackboard paint and I had a range of Chalkboards to sell at the Craft Fairs.