{Stus-List} Lazarette Hatch Delamination II

Bob Moriarty bobmor99 at gmail.com
Fri Dec 4 12:38:36 EST 2009


Great info Dennis. Thanks!

On Thu, Dec 3, 2009 at 10:35 PM, Dennis C. <captbuy at yahoo.com> wrote:

>  Maybe.
>
> Double tape the area.  That is, put down 2 layers of tape to give more
> definition to the smooth/nonskid boundary.  Not necessary but I like the
> look.  Roll the tape down hard with a wallpaper deam roller.  For that
> "factory" look, cut the corners to a radius with a razor knife.  Hold the
> knife at a maximum 45 degree angle to the deck.  30 degrees is better.
> Holding the blade more vertical will cause the tape to pull away from the
> deck.  Roll the tape again after cutting.
>
> Mix up the gelcoat, add about .5 to .8% wax solution, activate it "light",
> that is with .5% or so MEKP, then quickly mix in some colloidal silica to
> about a mayonnaise consistency.  (Don't add the silica before the MEKP.)
> Pour it on the deck and roll out around with a solvent resistant medium nap
> roller.  IMPORTANT: At the end, roll the entire area in one direction only
> to finish.
>
> As I mentioned in an earlier post, if the nonskid is a significantly
> different color than the underlying deck, consider rolling on a cover coat
> of the nonskid color and let it cure before rolling on the tickened nonskid
> gelcoat.  That way, the under color won't show through the thin spots
> between the peaks.
>
> Hint:  mix up at least a double batch tinted to spec.  If the first batch
> begins to kick off abandon it and activate the second batch.  You'll know
> it's starting to kick because the peaks will start to stand up more and get
> "pointy". (Now there's a highly technical term.)
>
> If you're doing a large area, try to break it up into smaller areas.  It's
> tough to mix up a batch that will cover a large area without either kicking
> too quickly or taking way too long to cure.
>
> Dennis C.
> Touche' 35-1 #83
> Mandeville, LA
>
>
>  ------------------------------
> *From:* Bob Moriarty <bobmor99 at gmail.com>
> *To:* cnc-list at cnc-list.com
> *Sent:* Thu, December 3, 2009 8:09:32 PM
> *Subject:* Re: {Stus-List} Lazarette Hatch Delamination II
>
> Hi Dennis,
> Was it you who explained how to get the "C&C non-skid" by using a roller on
> some semi-dry gel coat?
> --Bob M
>
> On Thu, Dec 3, 2009 at 8:51 PM, Dennis C. <captbuy at yahoo.com> wrote:
>
>>  Use finish gelcoat.  Gelcoat should be applied thin or it will crack.
>> No more that 1/32 inch thick.  No problem with applying two thin coats.  If
>> you don't want a super shiny finish, roll it on with a solvent resistant
>> roller from West Marine.  I often apply a smooth covering coat under a
>> nonskid application to ensure that the old color doesn't show through in the
>> "valleys".  If you want shiny, spray it on or do a lot of sanding.  Block
>> sand with 220, 320, 400, 600, 800, 1000, 1200 then machine polish polish
>> with AquaBuff 2000 or 3M Finesse-It with lots of water and a dual action
>> sander.
>>
>> One issue you may need to address is that it may dry tacky if you don't
>> add wax solution or cover it with PVA (also known as polyvinyl alcohol or
>> mold release additive).  If you wait until it is fairly firm, you can gently
>> paint on a layer of PVA and not leave marks.  You can also wait until it's
>> fairly firm and tape a layer of waxed paper on top.  If you do that, be sure
>> to tape all the edges.  Wax solution, PVA or waxed paper all prevent
>> humidity from contacting the curing gelcoat.  Humidity is what makes it
>> tacky.
>>
>> As for filling holes, etc. and prepping for the gelcoat, use "putty".  I
>> use 3M premium filler for starters and fine fill with glazing putty.
>> However, you can use Bondo auto filler and Bondo brand glazing putty from
>> WalMart.  Sand it smooth before applying the gelcoat.  Any blemishes will
>> show through the gelcoat.
>>
>> Good luck,
>>
>> Dennis C.
>> Touche' 35-1 #83
>> Mandeville, LA
>>
>>  ------------------------------
>> *From:* Bob Moriarty <bobmor99 at gmail.com>
>> *To:* cnc-list <cnc-list at cnc-list.com>
>> *Sent:* Thu, December 3, 2009 6:36:29 PM
>> *Subject:* {Stus-List} Lazarette Hatch Delamination II
>>
>> On to phase 2.
>>
>> I'm quite pleased with my epoxy/luan laminating effort. The result exceeds
>> my low, minimum standards. I'm now on to gelcoating the "money side".
>> Stopped by West Marine and picked up a quart of their Finish Gel Coat. My
>> plan is to take a chip of gel coat (courtesy of a dropped winch handle) to
>> the friendly folks at Ace Hardware and ask them to add the appropriate tint
>> to my can of gel coat. I suppose there are all sorts of possible problems
>> but I bet that Ace can get the tint much closer than I ever could.
>>
>> At any rate, assuming I have a reasonably tinted Finish Gel Coat, I'm
>> wondering about a couple of things.
>>
>> Should I get a different sort of gel coat (i.e. "Laminating Gel Coat") to
>> fill the cracks and chips in the lazarette lid and then cover everything
>> with the Finishing Gel Coat?
>>
>> Can I apply multiple layers of Finishing Gel Coat? It seems sorta thin.
>>
>> Thanks in advance to this excellent list.
>>
>> Bob Moriarty
>> Ox '76 33-1
>> Jax, FL
>>
>>
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>
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