You can customize your Strat just like how YouTuber Burls Art did it with 1,200 colored pencils and documented the whole process.
He prepped up the box with wax and arranged the pencils together in it. Everything was bounded up with epoxy resin. He then carved out the shape for the instrument, the routing, hardware, the electronics for the guitar and pickups.
While at it, he sanded it off before painting it to give it a smooth and colorful glaze and feel. Since he used pencils, there were minor touch-ups along the way for the pencils that broke apart while carving it out. To finish it all off, he then sprayed 4 to 5 coats of enamel. This keeps the design and the pencils intact.
Now you can start making your own guitar!