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Old 18 July 2012, 14:20   #21
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Quote:
Originally Posted by Peter_C View Post
Something like this type of rasp works great.
Those roller/rasps (or analogs thereof) are available in auto stores (Pep Boys/whatever Kragen is called now) for about $2.50. I usually buy out their display (4 at a time) as I seem to have a knack for losing them for some reason.

jky
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Old 19 July 2012, 21:29   #22
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Thank everyone sooo much for their time and effort in advising mee. I have learned a lot form everyone. My goal is to have this boat back in service before our aug 7 vaca to the gulf of mex. I am now working on removing the glue from some of my black rubber accessories. See attached photo. Pcs on right in untouched. Pcs on left has been worked over with a dremel flapper wheel. I am having a hard time determining when i have removed the glue and don't know when to stop? Any advice?

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Old 19 July 2012, 21:40   #23
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Center tube sta bond patches are holding strong. I followed everyones advice on these two patches. This area had a pin hole that i first tryed "loon" uv curable urethane from NRS that pealed off after two days. I have a loon pin hole patch on one of the main tubes that is still holding strong after 5 days. ? I will be checking it closely over the next two weeks. I was able to patch it inside and out with uv cure loon from NRS.

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Old 19 July 2012, 21:50   #24
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Black transom mount work will continue next. Top pcs has been worked but not sure if it is completely clean of glue. Bottom psc is "as peeled". Advice?

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Old 20 July 2012, 01:20   #25
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When aesthetics are important you will want to tape off around the edges, and clean with some acetone after the patch has been placed. Hope that makes sense. For instance when gluing the transom and floor, you will be able to see the past glue lines. You can tape these off with masking tape before applying glue. After everything is installed you peel the tape and follow up with some acetone to clean the residual glue off.

The rest of the pics are just to hard to determine the next course of action. Probably need to hold them in my hand to get a true sense.
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Old 20 July 2012, 11:23   #26
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Masking tape is definitely your friend! Your mek wipe, if you don't over do it, might lift an edge a bit. I just throw some more tape over it if the tape edge lifts. Be careful with the acetone or mek when cleaning. Excess solvent can affect the edge of your glued joint or seam.

It is always hard to see in a pic how clean a surface is. But the top rubber piece looks good and the lower does show some color like old glue. Can you get anything under your finger nail when you scratch along the piece other than rubber? I tend to go all out and make sure the surface is clean. If some small spot has some old glue on it will be surrounded by the rest of the bonded surface, but it is a weaker overall bond. Prep is everything if you want the repair to last.

Urethane pin hole patch material is okay. It works. How long do you want the repair to last? Where will you be taking the boat? I am going offshore in remote places, so I patch over any pinholes (fishing hook holes in my case). I need the abrasion resistance and the security of a full patch. Once your boat has a patch it just isn't such a big deal anymore! Just a suggestion. It is a personal preference.

Since you are shooting for a set date make sure you do any structural repairs first. You absolutely want everything to have time to cure. The specified 48 hours is a minimum. The glue continues to cure and the bond strengthens over a longer period of time. I try to wait 3-4 days on bonds like transom joints. This is particularly true if you overlap layers without giving each layer time to cure. Not absolutely required, but I always let underlying layers cure for a day or two before overlapping. If you do it all in one shot definitely give it time to cure.

I would say good luck, but it looks like you are doing what it takes to take luck out of the deal. Have fun!
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Old 20 July 2012, 11:38   #27
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Great advice Kelson, nice post mate.

Cheers, Don
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Old 20 July 2012, 22:16   #28
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The main tube pin hole the i referred to was patched with Loon UV cure urethane sealant from NRS. It has been holding for a week now. It was prepped with MEK. This boat will be going several miles offshore in the gulf of mexico (FL) but will be with our other 20' boat at all times. The margins are holding up tight. See pic. I have been jumping up and down on the tube everyday as a stress screening test. Thanks again everyone for the great advice. More updates to come...

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Old 22 July 2012, 11:23   #29
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Be sure to post up some more pics as the work progresses! I have learned a lot from checking out the repair pics and posts on the forum. There are so many different techniques or materials employed by other sib owners, it would be great to see how your repairs go.
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Old 22 July 2012, 17:25   #30
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I think i am done with one transom mount. MEK and a brass bristle brush is worked the best.
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