Two layers of 3/4 inch plywood cut to shape lined with 3 layers of 1/4 masonite
Sides of form are 3/4 inch masonite over the 3/8 plywood base, the base will stay permanently, the masonite underneath will be removed so no wood will show.
Rebar and wire mesh for extra strength on the 12" overhang
Time to add some concrete! Mash it into all corners and crevices with your hands
Looks pretty dry!
Add some nicely colored aggregate into the surface and hope they show up when polishing!
Doesn't look so dry anymore does it!
Cover and let it cure slowly!