Step 1: Tape the edges of the pan

Use painters tape to stop the paint from getting on the edges. Get tutorial here

Step 4: Season the paint with chalk

Color all the surface area so that when you write on it for the first time, it won't erase well. Get tutorial here

Step 7: Place magnetic hooks on the tray

You can use regular hooks, or magnetic hooks so you can always remove them and use the pan as a tray. Get tutorial here

Step 1: Apply Mod Podge on craft paper

Apply a layer of Mod Podge on the tray, place the craft paper and then apply another layer of Mod Podge. Get tutorial here

Step 2: Fix magnetic tape onto your items

Apply some magnetic tape to anything you want to place on the magnetic board. Get tutorial here