Hi Doug:
Yes, I first smeared a very light coat of elmers onto the fin. Once dried overnight I then sanded the edges then applied the CA. I've since applied duplicolor primer/filler and the fins look pretty crappy as in I've got a few of the horrid airpockets. I'm going to allow a good dry time, sand and see if I can just put on some sanding sealer first, then F and fill and call it done! Hope this makes sense! Take care, Jeff