I've been making some components using glass fibre, finished with car
body filler. They are caps, covers, and adaptors for various sizes of
tube. They will be installed outside so must be durable, waterproof, and
quite tough. The ones I've made are entirely satisfactory except for one
thing: it takes too long to make them. So, I was wondering about 3D
printing. Are the products from these tough, waterproof, and UV resistant?

Bill