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Old 04 September 2014, 10:08   #11
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why are you mixing gel coat and flo coat?
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Old 04 September 2014, 11:41   #12
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Quote:
Originally Posted by two stroke mick View Post
why are you mixing gel coat and flo coat?
I was thinking the same thing
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Old 04 September 2014, 12:23   #13
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Gelcoat goes on first in layers and the final layer should be flowcoat (with wax) so it sets hard.

The only trouble is if you sand through the flowcoat as you will have to reapply it in those areas.

Gelcoat has a chemical and mechanical bond.

Flowcoat only has a mechanical bond due to the wax.

It will be tough getting it smooth so fair play to him
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Old 04 September 2014, 13:23   #14
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So....

Gelcoat/resin won't cure in the presence of air. So, in order for it to cure, wax is added - this is what you guys call "flowcoat" (in surfboard repair, this would be called "Sanding Resin" versus the non-wax "Laminating Resin"). The wax effective "floats" to the surface and creates a barrier so that the resin can then cure in the absence of air.

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The only trouble is if you sand through the flowcoat as you will have to reapply it in those areas.
Why wouldn't multiple layers of unwaxed gelcoat cure under a final layer of waxed "flowcoat"? The flowcoat would seal the previous layers of gel from the air and the gel should cure, right???
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Old 04 September 2014, 14:14   #15
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I think the layers of gel underneath the flowcoat will go off. From what I could gather from this site and others gel and flow coat are quite similar, but flowcoat is a bit thinner and has wax in it to seal it off from the air for the final cure.

The wax rubs off flowcoat and the resin is still hard so I think gelcoat will be too once it has cured under the flowcoat.

The reason I went for layers of gelcoat first was that I believed it to be a bit thicker than flowcoat, so I could build up some thickness in each layer to protect against scratches and without the wax I could apply layer upon layer without the sanding. The final coat was with wax so the whole thing would cure.

That was the plan anyway, it is all a bit of an experiment to be honest

I really underestimated the amount of sanding though, I have done plenty of surfboard repairs over the years, and dumbly figured it would be an upscaled version!!

I have given up for day, all my finger tips are raw I think there is another day of work, working up to 1000 grit and it should be done (fingers crossed!)
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Old 05 September 2014, 08:45   #16
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Good luck with the sanding &V fairing, its hard work on that stuff. I have done a few boats that way and it works. But generally think its much, much easier to work with light epoxy putty,2 k epoxy primer and 2k PU coat on top to get a nice and even stronger finnish.

When laminating against a mould , on a less than 24 h painted gelcoat, there will be chemical(sort of) and mechanical bond. When painting gelcoat or flowcoat on old laminate, there will be only mechanical bond on the first layer of laminate.

But sometimes only way to get original color is to use gel/flowcoat. One thing have noted when working with gel or flow. Its easier to get a reasonable surface if protecting the working area from UV rays during painting. Its not only the temperature, somehow painting in a sheltered place(inside or tent) is much easier than under open sky, even if the temp is the same. Or then i only had to much polyester fumes....
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Old 06 September 2014, 11:25   #17
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SR4 Project

I don't envy your workload. The result, however, should be worth it.

I have just finished an SR4 restoration and conversion from deluxe sports configuration to work boat . Fortunately my hull and deck are OK and original. I flowcoated the new jockey console and rear locker seat and that was enough.

Here are some before and after pics.
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Old 06 September 2014, 12:39   #18
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Mr firefly, I do like that console, did you fabricate it or bought it as it came?
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Old 06 September 2014, 14:57   #19
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I bought off this forum for 25 still unpacked. I had to beef it up with GRP and ply, fit the hatches and flowcoat it to match the deck. I made the windscreen from the original deluxe screen. Can't wait to get the seats on.
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Old 06 September 2014, 15:01   #20
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Console

I bought it from Bingomike, he might be able to tell you where he got it from.
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