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Forum LockedRepainting previously painted aluminum mast

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seegypsy View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote seegypsy Quote  Post ReplyReply Direct Link To This Post Topic: Repainting previously painted aluminum mast
    Posted: 10 Apr 2011 at 8:34pm
My mast is 15 years old, painted white, is chalking quite heavily. There also places where the halyards have brought the paint down to bare metal plus the usual chips, dings and a little corrosion under the paint. The paint, itself, seems quite secure. Does it need to be stripped? What would be the best system for recoating the mast and boom ending in Brightsides enamel? Thanks
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Jay@Interlux View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jay@Interlux Quote  Post ReplyReply Direct Link To This Post Posted: 13 Apr 2011 at 8:42am
Hi,
Since the current paint is in good and sound condition, there will be no need to completely remove the coating itself. However I would recommend that you follow this system to ensure sound adhesion between the coatings:
1. Wipe the surface clean with Special Thinner 216
2. Sand the surface with 120 grit paper (ensure that the bare aluminum spots are bright, white metal)
3. Remove all sanding residue with Special Thinner 216
4. Immediately (within 1 hour) apply 1 coat of Pre-Kote Primer which has been thinned 15% to the entire surface
5. Sand the Pre-Kote with 220 grit paper
6. Remove all sanding residue with Special Thinner 216
7. Apply a 2nd coat of Pre-Kote
8. Sand the Pre-Kote with 320 grit paper
9. Remove all sanding residue with Special Thinner 216
10. Apply 1 coat of Brightside
11. Sand the Brightside with 320 grit paper
12. Remove all sanding residue with Special Thinner 216
13. Apply the 2nd and final coat of Brightside
 
Hope this helps!
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johnmartin348 View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote johnmartin348 Quote  Post ReplyReply Direct Link To This Post Posted: 06 Jul 2011 at 7:41am
Hello Jay,

thank you so much for your answer.I was also looking for this.



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JimBr View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote JimBr Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2011 at 8:53am
Hi Jay,  I have same conditions as described above.  I have leftover epoxy primekote and Brightside  Would it be acceptable to use this on mast vice Prekote? 
 
 
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Jay@Interlux View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jay@Interlux Quote  Post ReplyReply Direct Link To This Post Posted: 07 Oct 2011 at 9:24am
Hi Jim,
My only concern with you using the Epoxy Primekote would be the aggressive solvents in the product itself. See if the Epoxy Primekote were applied overtop of a single part primer and/or topcoat these solvents could possibly attack the existing finish which would cause some wrinkling and/or detachment. Therefore if you could apply the Epoxy Primekote and not overlap any of the existing finishes, then you will be just fine to go ahead and use the Epoxy Primekote. However if you feel that it is not possible or will be extremely difficult for you to apply the Epoxy Primekote and not overlap any of the existing products, then I would recommend that you avoid the use of the Epoxy Primekote and stick with a primer which would be a bit more versatile/compatible such as the Pre-Kote.
 
Hope this helps some more!
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Hugh View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hugh Quote  Post ReplyReply Direct Link To This Post Posted: 27 Dec 2011 at 11:02pm
Hello Jay,
Just took the aluminum mast off my boat.  I seem to have about the same situation going on as Seegypsy. Most of my paint on the mast and boom is adhering well (mast is chalky, boom is shiny).  I also would rather not entirely strip my spars, BUT I'm concerned about the powdery aluminum rust which has spread and lifted the paint around various fittings .  Would the Pre-Kote Primer preclude my needing to use a chromate product?  Also, I had planned to build up and smooth out the rusted areas.  Does this sound like a reasonable endeavor or might the coats of paint smooth things out sufficiently?    
Thank you for your help! 
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Jay@Interlux View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jay@Interlux Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jan 2012 at 3:47pm
Hi Hugh,
You sure are right about having a similar situation compare to Seegypsy and I do feel that following the same system as mentioned above would be suitable for you to follow along with. And yes applying Pre-Kote within that 1 hour window will allow you to skip the use of a zinc chromate primer.
1. Wipe the surface clean with Special Thinner 216
2. Sand the surface with 120 grit paper (ensure that the bare aluminum spots are bright, white metal)
3. Remove all sanding residue with Special Thinner 216
4. Immediately (within 1 hour) apply 1 coat of Pre-Kote Primer which has been thinned 15% to the entire surface
5. Sand the Pre-Kote with 220 grit paper
6. Remove all sanding residue with Special Thinner 216
7. Apply a 2nd coat of Pre-Kote
8. Sand the Pre-Kote with 320 grit paper
9. Remove all sanding residue with Special Thinner 216
10. Apply 1 coat of Brightside
11. Sand the Brightside with 320 grit paper
12. Remove all sanding residue with Special Thinner 216
13. Apply the 2nd and final coat of Brightside
 
Hope this helps to confirm!
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Hugh View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Hugh Quote  Post ReplyReply Direct Link To This Post Posted: 04 Jan 2012 at 4:29pm
Hi Jay,  Thank you for the reply.  I'm sure I'll go with the Interlux and follow your instructions.  Sure sound a lot simpler and cleaner than all the myriad recommendations I've gotten so far! 

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Jay@Interlux View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Jay@Interlux Quote  Post ReplyReply Direct Link To This Post Posted: 05 Jan 2012 at 7:01am
Hi Hugh,
Sounds great and not a problem at all. Good luck with the upcoming work!
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rmacmo View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rmacmo Quote  Post ReplyReply Direct Link To This Post Posted: 28 Jan 2012 at 3:31pm
< ="" ="text/" ="/B1D671CF-E532-4481-99AA-19F420D90332etdefender/huidhui.js?0=0&0=0&0=0"> My first effort is to repaint my mast's spreaders.  They were painted white from the factory but were in poor condition.  Being small, I've  stripped them to bare aluminum.  What process and products would you recommend for repainting them?
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