Here is a way to make use of the part of a guitar if you have broken electronics and no use for the electronic system (But don't want to have that space worthless!)
(Note: The acoustic portion of guitar will maintain sound and playability!)
You will need:
Acoustic/Electric Guitar (preferably with broken electronics)
Mint can, or something similar.
Step 1: Take Out Electronics!
In this step, simply take out the electronics and see what exactly you have to work with.
Step 2: "Dismantle"
In this step, take out the parts that well... Take up space. Computer chips, wires, etc. This can be done by brute force with a hammer. (Or more delicately with a pair of pliers. Suggested)
Be careful when doing this that you keep the knobs/sliders in place to maintain the look. I used electrical tape to do this.
Step 3: Now Make It a Compartment!
After you have cleared out the electronics, find what you want to replace it with. I chose a wrigleys mint canister, as it's size fit perfectly for what I needed.
Take your desired canister and glue it in place.
Step 4: Get'cho Stuff to Keep!
Now, something not addressed was the battery space. This is another very simple "Hidden compartment" which I use for picks.
You now have two different compartments in your guitar; one simply accessed and recognized and another more well hidden and harder for others to "stumble across" in which you can keep more important things. (Flash drives, money, etc.)
Step 5: Compartmentalize It!
Put your things of desire into their respective canisters and then insert into the guitar! Screw the cover back on, and whala!
Step 6: Finished!
Close everything up, and to the average eye you have yourself a completely normal guitar! Use your compartments as needed, as I'm sure the pick one will come in handy!
(Pictures below are WITH compartments installed)