Check out a product called Stans No-Tubes its used to convert Mountain Bike wheels into a tubeless setup by using a rim strip and a sealant. I dont know if they make a specific application for that small of a wheel but with some ingenuity Im sure it can be done
NoTubes.com - Tire Sealant, Tubeless Conversion, Tubeless Rims & Wheels
Plus I dont know if the rear shock spring is going to be visible but Ive got a few various lenght/weight black springs laying around from my mountain bikes if you wanna go black with it you can have one.