Before you sand blast them you can also use a heavy tape & tape it all off exspecially the skirt of the sleeve. If your doing the top end keep the head bolted on and then all you have to do is tape of the reed cage port and the bottom of the sleeve. My neibor has a sand blast boot with glass bead so if you want give me a call and I can do it for you
PM me for my # Mike
2002 hybrid cannondale speed- slightly moddified
2006 White YFZ450-LRD Pro4r w/ custom inserts, DynoJet jet kit, Protaper/pro grip, Tusk fuel screw, DWT beadlock wheels, IRazr tires, RPM axle