Step 1: Cut Your Cardboard
Draw the form of your store bought tombstone,
Cut around it and add a bottom , hot glue the forms together , remember to add some sort of structure to it And add it to the middle so both
Cardboard and tombstone stand up by themselves,
Add sand for weight use ziplock backs if you have them , if you don't your old Walmart bags will do. Add enough to make it heavy so it won't fly around everywhere.
Now it's ready to "glue" together take your paper mache mixture and seal it all around the sides make sure there no holes,
Step 2: Drywall Paint and Seal
Now Drywall add a small tiny. Bit all over the side and the back, it'll create texture and it make it a little hardier, wait till it dries, ( couple hours) and start painting , mix in black gray and white for a rock like finish ( use a sponge for this step) let it dry and seal with marine varnish . now sometimes..... the varnish will leave it a little too glossy for my taste so what i did was i got a finishing spray in matte krylon makes one and it's amazing !! And we're done!!!!!
Happy hauntings !