When I used to shoot a lot of aluminum arrows, I would dip (usually in clear) to give the glue a great surface to adhere to. This also works with carbon as well. Dipping in clear, you don't even have to be that fussy. You can clear dip just past where your fletching will sit, let it dry, then glue away. For the past 10 years at least now, I have use nothing but Platinum and I have had zero issues or complaints. Regardless of shaft material, prior cleaning with acetone where you are going to dip / glue is a smart idea.