You have to use a 2 stage clear. This means you have to add a catalyst to the clear to aid in the hardening process. The 2 and 3 stage clears harden up better than any clear you get in a spray can. It is the smae principal as epoxy. The 2 parts are a liquid or gel until they are mixed, once mixed they turn into a rock. This is why you need a 2 stage clear. You can do a couple of things. If you can spray clear yourself go buy a quart at your local auto paint store. Innate.com also sells small quantities. You can not spray a good clear with an air brush!! Or you can send it to me for a few bucks and I can clear it. Or you can go to your local body shop with a 6 pack of old Milwaukee and ask them to shoot it. The last one works better with Heineken.