Chloroplast was not the material of choice for me. It will split when hit with a paintball. You will be replacing it shortly. Some guys say it works. Personal experience by me say no.
Go shoot some paintballs at it from 20 feet away. You can get a sample out of the scrap bin at you local sign making store. They can also order your chloroplast for you with their next order. Shipping is a bear if you want 4x8 sheets. Won't come except by truck so your shipping will probably cost more than your order.. So that sign store will be happy to split the shipping with you.
4" x 4 foot x 5 foot is about as large a package you can ship and you are still paying for an oversized package.
Now here is what I use. Polycarbonate twin wall 6mm or 1/4" is what I use. A 4'x8' sheet is 7.25 pounds.
You can empty a hopper point blank at it and it will not break or split.
They use it for roofs on greenhouses, pools, etc. It take hail. Polycarbonate is what they make safety glasses out of and you will note it ain't cheap but buy the time you replace your chloroplast once, you will be out the same money...
Here is the website link.
There are other manufacturers. Search Twin wall "Polycarbonate"
But this is the only place I can find that sells the polycarbonate profiles to put it together with.
This is the link to the specs.
You put it together with these profiles.
Now both my walkers are backpack based "Mech Warriors" inspired by the Star Wars ATST....
Used your standard Army Surplus ALICE frame ($40-60 without the canvas pack)
My first walking tank screwed this polycarbonate onto the frame. Over 4 seasons of replacing bent frame pieces, I noted that the "armor plate" polycarbonate was holding up better than the frame and taking a LOT more abuse while doing it.
My second walker eliminated the frame. The polycarbonate was the structural material the body was made out of. Used those polycarbonate profiles and literally glued it together with a 8 oz bottle of super glue from my hobby store.
Here is a pic under construction
And with the first coat of paint and autoloading cannon installed minus the "chicken legs"
As you can imagine WEIGHT was the critical factor. That is the PROBLEM with every walking tank including mine. They get heavy real quick. Remember if you have a RPG, marker, paint, nerf, Two air tanks etc. You are hauling 35 pounds of GEAR. Then add the weight of a tank to push drag or carry up and down all the hills in the heat...
Would you believe that poly carbonate "monobody" weighs only 15 pounds with no paintball gear in it? NOBODY does. They think I will wear out in a couple of hours or so. Then they think I'm ex special forces or a triathalon guy. I just tell them I'm Superman's Uncle....
Well I had to upgrade mine a bit with an autoloading cannon and a 20 pound (500ci x 3000) air tank so it is battle ready at 65 pounds. It still gives me a workout but they won't let me run in it. So I just stroll around the field causing trouble.
Well, this polycarbonate twin wall is the material of choice for a walking tank where weight is a major consideration.