The recycling system (imperfect as it was) has completely collapsed so This is a way to repurposed some of the waste glass you may have in your trash or scrap bin.

Some surfaces just need traction to prevent unwanted slickness; skateboards, boat decks, equipment, etc. I use the technique of adding finely crushed glass and polyurethane on my skate decks and have been considering applying this type of grip to our tractors foot plates. Today I will teach you to crush glass and apply it to a surface. I will be using colored glasses to apply a patterned graphic to a skate deck. (this is a stand alone part of a skateboard build because there isn't a glass crushing instructable) See the skateboard build.

(picture 1 this build finished. Designed by 4 year old offspring)

(picture 2 first experiment with glass grip; no top coat crazy sharp.)

(picture 3 experimenting with colored glass for designed grip and topcoats, much better)

Supplies

Things that might help. (I used)

PPE: personal protective equipment. (safety gasses, gloves, hearing protection (I should have used a mask)) Mask up in Public!
Glass to Crush
Steel pipe with cap, about 1m long. (post pounder)
Ram rod "long steel object to break the glass in the pipe". (T post)
Sieve or screen with holes that will provide the desired glass size. (stainless steel window screen)
Catch pan (litter box)
Glass storage container (can)
Surface that your tired of griping about due to its lack of grip. (skateboard deck)
Adhesive polymer (polyurethane) paint or epoxy will work to.
paint brushes your willing to throw away (the glass will ruin them)
masking tape if needed
optional or as needed; hammer, jar with shaker lid, utility knife, painting assisting devise (scrap board with screws in it to hold object)

Step 1: Where to Get Your Glass

Your recycling (or trash as many areas have stopped recycling recently) is a good source for clear, green, brown and blue glass bottles and jars that could be used for this project. If you want colors beyond the common food and drink
variety you will need to look for stained glass or glass blowing supplies. (there are many small and independent shops all over the world so shop locally (and wear your mask)) I used to make stained glass windows so I have a healthy supply of small scraps perfect for the task.

Step 2: Turning Glass Into Sand

Use your PPE!!! And use a mask glass dust can mess up your insides. I stayed down wind of the dust but still had glass dust in my snot.

Watch the video it will help (with one arm it is difficult to document and do simultaneously so video has become default). I apologize for the sound quality it was my first time using a gopro.
Set up your capped pipe and other screening equipment in a low traffic area where the grass will grow and cover up any stray glass.
If using food and drink container or larger pieces of glass wrap them in a cloth and break them up with a hammer, till they will fit into your caped pipe.
Put a handful or two of glass shards into your capped pipe.
Using your pounding tool ram the glass over and over until the glass inside is pulverized.
Put your screen over your catch container, pore the pulverized glass onto the screen.
Gently shake the screen; the fine glass will fall into the the catch container and the larger pieces of glass will remain.
Repeat steps 3 threw 6 adding in the unpulverized glass from step 6 until you have enough glass for your project or many.

Step 3: Application to the Surface

Properly prepare you surface, sand, clean and mask off areas you don't want Glass on as needed. (picture 1)
Apply a healthy coat of polyurethane to surface. (picture 2)
Using a shaker jar evenly sprinkle your glass to the surface; if you want to have multiple colors sprinkle carefully or selectively distribute your polyurethane. (picture 3)
Allow surface to dry.
Pore off excess Glass and store for later use. (picture 4)
Remove any masking you may have used. (picture 5)(picture 6 shoot I missed some masking)
Add one or more top coats of polyurethane as needed; this helps prevent glass shedding and minimizes the sand paper like behavior of the surface. ( falling on an unsealed glass surface will give you the worst road rash) (picture 7 topcoat 1, 8 topcoat 2)

Wrap your brush in a plastic sack between coats. Once your brush collects glass particles it will spread them to places you don't want so be sure to poly unglassed areas first like the bottom or sides.

Enjoy your newfound grip on your world.