S3 paint: A love/hate thing

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fishingdan
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S3 paint: A love/hate thing

Post by fishingdan » Fri May 05, 2006 4:32 pm

I love lots of things about the S3 paint including; no fumes, water cleanup, designed for amateaurs, and glossy enough.

I hate how sensitive it is to temp and humidity changes. :x :x :x :x

Here is an example:

Paint mixed with crosslinker and thinned 10% with pure water.

Last night the garage temp was 65 degress and the paint went on beautifully. A couple of minutes after tipping and everything flowed out well.

This morning the garage temps were the same and the experience was the same.

This afternoon, it is about 77 degrees and the paint is drying too fast to flow out well after tipping. As usual this was planned to be my last coat and now I will need to sand and reapply because of brush marks. I even reduced the working area to a roughly 1' x 1' area.

Does anyone know the magic forumla for working with this stuff when the temp increase 10 or 12 freaking degress??????



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ArizonaBuilder
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Post by ArizonaBuilder » Fri May 05, 2006 4:45 pm

I haven't done the topcoat yet. But with the primer and spraying I was able to get a really nice coat when I thinned out 12oz of primer with 10oz of 50/50 mix of water and isopryl alchol. I did get runs in one location where I held the gun a second two long. But it flowed really nice over the rest of the boat. The next coat I only used 8oz of thinner with the 12oz of primer and the coat did not flow as well but was still very acceptable, but I could tell the finish was a little rougher. This all done at 92 degrees F and 26% humidity.

yes the flow characteristics are very sensitive to humidy/temp. I would suggest if it is not flowing correctly stop and thin it out a bit more. It is a trial and error approach but you need to thin according to your conditions.
And the amount of thinning will vary depending upon the application. When spraying it will be thinned more due to the drying effect of the spraying.

My understanding is the topcoat will have the same flow temperment.

So no magic bullet here... :cry:
Beer is living proof that God loves us and wants us to be happy.
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fishingdan
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Post by fishingdan » Fri May 05, 2006 4:59 pm

I just got off the phone with S3. Of course, they have no tech support specialists today. :?

The answer I received today was "its too warm". The top-side paint is thinned with water only. The can says up to 10% and I am already at that level.

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Post by Davef » Fri May 05, 2006 11:04 pm

Try thining it more. I did and it worked fine. I sprayed mine on in 80+ temp days and thinning helps. I'm sure I went way over 10% with no problems. I think it's just a matter of doing what it takes to work. Good luck.
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fishingdan
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Post by fishingdan » Sat May 06, 2006 12:34 am

Thanks Dave. I have calmed down from ealier today. I was ticked because I was almost done.

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Post by ks8 » Sat May 06, 2006 1:46 am

Two things...

1- if you are in a fairly enclosed area, spray water with an atomizer into the air to bring up the humidity.

2- I have a 6 inch round flat bottomed clear glass bowl that I put a test batch, very small, of thinned topcoat in, maybe a little more than 1/16 inch. I let it sit for 10 minutes, stir a little, and see how quick it thickens. This gives me an idea of how much I need to thin the actual application batch for those weather conditions. That batch then gets flushed.

I'm spraying, but the issues are the same, just manifest different in application from the gun. On hot days, I MUST cool the air to the gun or there are problems with fine gritty application as the spray begins to dry before or just as it meets the surface, no matter how much or little I thin. With cool air, no problem. During outright rainy weather, beautiful flow! :)

Best application yet was during a very wet noreaster. If I remember right, 14 inches rain that week. Who'd a thought it would be perfect weather to spray topcoat?! It did take several days to dry to the touch though... even with crosslinker.

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Post by glennt » Mon May 08, 2006 1:28 pm

I have also had difficulty getting s3 paints to flow out properly. One item is that the brand new cans of wr-lpu have two updates to the instructions. They say to reduce by up to 30% instead of 10% and recoat crosslinked paint without sanding up to 24 hours later. I reduced by 20% in sixty something degrees humid conditions and the finish has a slight brushmark texture which I'm accepting and moving on.

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Post by fishingdan » Mon May 08, 2006 4:09 pm

I did some more painting yesterday. The results were better, but not as good as the previous 2 coats. I will take a couple of pictures to show you the difference. The previous 2 coats were "perfect" if I say so myself. Not a single brush mark and a very nearly gloss like finish.

Like glennt, I am moving on. I will wet sand the front of the console and then rub it out with 3m finesse.

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