Diving Board Surround Material Question

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  • Ray McCooney
    E30 Enthusiast
    • Jun 2006
    • 1088

    #1

    Diving Board Surround Material Question

    I was just wondering at what point it would be considered not worthwhile condition wise on the plastic bumper surrounds for painting. I currently have the following condition on the front and rear bumper surrounds on my '87. I was going to touch up the surrounds at the same time as I paint my diving boards when I tuck them. Should I just find more suitable replacements to use as a base, or will a degree of sanding and prep work out fine for the ones that I currently have?

    Pic:


    Any help will be greatly appreciated. Thanks.
  • ANDRÜ
    E30 Enthusiast
    • Aug 2006
    • 1020

    #2
    Well if you paint them as is the final product will be rough like the surface is now. I would try sanding the surrounds nice and smooth, then paint them. If that doesnt work just get new ones maybe...

    Comment

    • Ray McCooney
      E30 Enthusiast
      • Jun 2006
      • 1088

      #3
      Originally posted by mooseoftoose
      Well if you paint them as is the final product will be rough like the surface is now. I would try sanding the surrounds nice and smooth, then paint them. If that doesnt work just get new ones maybe...
      Yeah, that was my initial intuition. I have never payed attention to how much these surrounds go for in the used market. Perhaps it would just be better to find some smoother/cleaner ones to use as a base instead of trying to make the current ones work with more effort than they probably deserve. Thanks for the insight.

      Comment

      • AndrewBird
        The Mad Scientist
        • Oct 2003
        • 11892

        #4
        It's hard to find good used ones as they all did they same thing; warp and pit like that. The problem is, new ones are spendy.

        I would try sanding them before paint and then go from there.

        Comment

        • ddavidv
          Grease Monkey
          • Aug 2006
          • 344

          #5
          Try sanding them. You may have to get a bit neanderthal on them to really clean them up. If you've got any bad gouges or pitting, you could probably fill it with epoxy.
          sigpic

          Comment

          • Ray McCooney
            E30 Enthusiast
            • Jun 2006
            • 1088

            #6
            Good Deal, looks like I'll be getting to work. Thanks Nitro and Ddavid. Any recommendations on sand paper grit?

            Comment

            • StereoInstaller1
              GAS
              • Jul 2004
              • 22679

              #7
              I wonder if a thorough cleaning and starting off with a high build flexible primer would work...them is nasty!

              As far as sandpaper, if on a DA, I would say 320. If by hand, nothing under 400, maybe even 600.

              GL!
              Luke

              Closing SOON!
              "LAST CHANCE FOR G.A.S." DEAL IS ON NOW

              Luke AT germanaudiospecialties DOT com or text 425-761-6450, or for quickest answers, call me at the shop 360-669-0398

              Thanks for 10 years of fun!

              Comment

              • Ray McCooney
                E30 Enthusiast
                • Jun 2006
                • 1088

                #8
                Originally posted by StereoInstaller1
                I wonder if a thorough cleaning and starting off with a high build flexible primer would work...them is nasty!

                As far as sandpaper, if on a DA, I would say 320. If by hand, nothing under 400, maybe even 600.

                GL!
                Luke
                Noted. Thank you sir.

                Comment

                • Apex381
                  Mod Crazy
                  • Mar 2004
                  • 740

                  #9
                  Good luck to you. I never had any luck trying to recondition any, and I've been through about 3 sets of surrounds now. As soon as I sand them and paint them where they look good the damn things start warping on me.
                  1987 325is - sold
                  2001 330i - New DD

                  Comment

                  • Ray McCooney
                    E30 Enthusiast
                    • Jun 2006
                    • 1088

                    #10
                    Originally posted by Apex381
                    Good luck to you. I never had any luck trying to recondition any, and I've been through about 3 sets of surrounds now. As soon as I sand them and paint them where they look good the damn things start warping on me.
                    Greeeeeeat! Oh well, thanks for the insight. Euro bumpers anyone??? :)

                    Comment

                    • Apex381
                      Mod Crazy
                      • Mar 2004
                      • 740

                      #11
                      Originally posted by Ray McCooney
                      Greeeeeeat! Oh well, thanks for the insight. Euro bumpers anyone??? :)
                      I think you could try the surrounds for the cabrios or buy a set new. If I rember correctly they are not made of rubber and are meant to be painted. In my opinion after you spend all the money for new surrounds and trim and paint and other materials you could have bought part of a euro bumper set or small bumper swap. I gave up and I'm converting to small bumpers:D.
                      1987 325is - sold
                      2001 330i - New DD

                      Comment

                      • Ray McCooney
                        E30 Enthusiast
                        • Jun 2006
                        • 1088

                        #12
                        Originally posted by Apex381
                        I think you could try the surrounds for the cabrios or buy a set new. If I rember correctly they are not made of rubber and are meant to be painted. In my opinion after you spend all the money for new surrounds and trim and paint and other materials you could have bought part of a euro bumper set or small bumper swap. I gave up and I'm converting to small bumpers:D.
                        Hmm. Interesting. So then cabrio surrounds are a direct swap. The rational side of me does find the idea of just finding Euro bumpers from the get go more and more appealing. Thanks yet again.:)

                        Comment

                        • AlarmedBread
                          E30 Mastermind
                          • Sep 2006
                          • 1510

                          #13
                          It's a urethane, I had the same type of flaking on mine and sanded it with a 180 feathering disc, then filled the deep pits with the same urethane epoxy I was using to delete the side markers (it's a two part mix in tip type, can look what brand if you want). This got them pretty smooth and the epoxy sanded nicely, I used a little glazing putty to fill in the pinholes then a coat of sand able primer, sand again, trim black, wet sand and they come out pretty nice. Just takes some patience.



                          Comment

                          • ToplessE30
                            R3V Elite
                            • Oct 2003
                            • 4791

                            #14
                            I have some front convertible surrounds for sale if you want them

                            Estoril E36 M3/4/5 | Toledo E53 X5 3.0 | LeMans E90 335D M-Sport

                            Comment

                            • amdspitfire
                              Wrencher
                              • Mar 2006
                              • 254

                              #15
                              Originally posted by AlarmedBread
                              It's a urethane, I had the same type of flaking on mine and sanded it with a 180 feathering disc, then filled the deep pits with the same urethane epoxy I was using to delete the side markers (it's a two part mix in tip type, can look what brand if you want). This got them pretty smooth and the epoxy sanded nicely, I used a little glazing putty to fill in the pinholes then a coat of sand able primer, sand again, trim black, wet sand and they come out pretty nice. Just takes some patience.


                              whats the purpose of wet sanding after painting? What kind of grit should be used?

                              Comment

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