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Old 18-03-2013, 17:10   #1
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Topsides paint disaster. HELP !

Painted the topsides with polyeurethane single pot paint (Epifanes) after using two pack epoxy primer using a velvet roller, first coat fantastic with just a couple of areas where the scrape repairs could just be seen through the paint, so decided on a second coat, flatted the paint with 400 grit wet and dry (as we did with the primer) on Wednesday applied the second coat and either a heavy dew formed or a light shower/mist came and now the finish is very bloomed and matt finish. Now my dilema is that the the boat is due to be relaunched on the 28th and the weather forcast is for rain every day, I asked to see if the yard could give me a later date but the only slots are in May and I have a charter booked for mid April which I can't really afford to turn away. I have spoken to the paint supplier (a professional trade supplier) and He said try to find a window in the weather or relaunch and when the weather breaks put her ashore for a tide and paint her then, first one side then after about a week the other side. He also suggested trying to flat and polish the paint so I thought I'd give that a try (Maybe the transom to see how well it works). Has anyone ever done this? He suggested flatting with 400 grit wet and dry wet then 800 then 1000 then polish with compound then polish with hard or liquid wax, are these the right grits? Would a polymer sealant be a good idea? I have flatted the transom with 400 wet and dry tonight in the rain with the car headlights for illumination.
If anyone has done this can they please give me some advice.
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Old 18-03-2013, 17:33   #2
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Re: Topsides paint disaster. HELP !

You might be starting off too course on the paper, that's a lot of marks to remove. But depends on the surface texture.

I'm afraid the "look" of the bloomed or matted areas may be more than skin deep.

Do the bloomed areas have reasonably smooth surface texture and maybe looks like a different or lighter color?

Other's here, like minaret good to offer sound advice, so stand by.
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Old 18-03-2013, 18:12   #3
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Re: Topsides paint disaster. HELP !

Thanks for the reply.
The bloomed areas (the whole boat) are quite noticable when you run your hand over them, the area I have cut back is now completely smooth and looks OK but is now matt finish, it took approx an hour to flat the transom area about 5 feet wide. Are you suggesting I start with 600 of 800?
Have just checked the weather and there may be a clear day on Wednesday, 20% chance of rain, I've asked for Wednesday off and they have said ring in on Tuesday afternoon to se how busy we are, fingers crossed
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Old 18-03-2013, 18:20   #4
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Re: Topsides paint disaster. HELP !

I had exactly the same thing happen when I painted a car in my back yard. 10 minutes after I finished spraying it, the fog rolled in and it made the whole car blush. I sanded it all with 1200 and polished it and it looked perfect and still looked perfect years later when I saw it again.
Welcome to the wonderful world of paint!
When I painted my cabin top last November, the weather was perfect, nice & warm and no wind. As soon as I finished my last coat, the wind shifted and ash from a brush fire 10 miles away fell all over my wet paint.
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Old 19-03-2013, 07:30   #5
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Re: Topsides paint disaster. HELP !

This is why we never paint outdoors. The money saved by not renting a big shed for a few days to topcoat is often lost and then some by having to reshoot, or just lost in the cost of lay days while waiting for a weather window. $100 a day is a pretty standard shed fee around here, plus another $150 or so to move the boat. So at our yard a few hundred bucks at top coating time puts you under cover.


I'd reshoot it myself, but sometimes polishing works. Don't use anything coarser than 1000 grit on it, or you'll probably blow through before you finish polishing. If it was well sprayed with nice flow, not too much peel, and not too much blush, then you might be able to save it. If it was shot poorly or brushed it'll never happen. Often with single part paints the color difference won't go away, odds are vastly better with two part paint. The reason I'd reshoot is that a sanded finish won't last as long as a virgin shoot. It'd be fine for at least a couple of years though. Use guide coat to prevent over sanding when polishing. Real guide coat is necessary for grits this fine, or you will have problems with clogging.
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Old 19-03-2013, 09:02   #6
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Re: Topsides paint disaster. HELP !

And this is why I won't paint in the spring. Too damp, temperatures too low for fast drying. I always haul for painting in the summer in a good weather window and work fast... which is easy when the weather is right. Spring is tempting but ultimatly too frustrating.
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Old 19-03-2013, 14:48   #7
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Re: Topsides paint disaster. HELP !

This is why I don't paint

But then I don't charter either. I hope you get it worked out.

good luck.
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Old 19-03-2013, 15:13   #8
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Re: Topsides paint disaster. HELP !

Quote:
Originally Posted by minaret View Post
Use guide coat to prevent over sanding when polishing. Real guide coat is necessary for grits this fine, or you will have problems with clogging.
Just curious on what you personally use for your guide coat.
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Old 19-03-2013, 16:16   #9
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Re: Topsides paint disaster. HELP !

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Originally Posted by Khagan1227 View Post
Just curious on what you personally use for your guide coat.


Several. This for most stuff.


YouTube


For really fine paint prep I use blue steel dye mixed with acetone and wiped on. Don't do this for polishing though.
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Old 19-03-2013, 16:54   #10
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Re: Topsides paint disaster. HELP !

Quote:
Originally Posted by tbodine88 View Post
This is why I don't paint

But then I don't charter either. I hope you get it worked out.

good luck.
I don't paint, charter or polish.
My gelcoat is slightly chalky, but I prefer that to slippery.

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Old 20-03-2013, 15:28   #11
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Re: Topsides paint disaster. HELP !

Quote:
Originally Posted by minaret View Post
Several. This for most stuff.


YouTube


For really fine paint prep I use blue steel dye mixed with acetone and wiped on. Don't do this for polishing though.


I thought that was always just hype. I'm getting ready to paint hull and topsides, so I'm going to give it a shot.

Any idea how fine of grit one can go using this system?

Does it plug the sanding disks like (ahhm...) spray paint?
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Old 20-03-2013, 17:10   #12
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Re: Topsides paint disaster. HELP !

Quote:
Originally Posted by Khagan1227 View Post


I thought that was always just hype. I'm getting ready to paint hull and topsides, so I'm going to give it a shot.

Any idea how fine of grit one can go using this system?

Does it plug the sanding disks like (ahhm...) spray paint?


I don't guide coat past 1000/1500. It's an excellent habit, the benefits are numerous.
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Old 22-03-2013, 15:25   #13
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Re: Topsides paint disaster. HELP !

Just to throw my $0.02 in, after painting our deck with 2 part:

You will have to repaint - you won't be able polish this out acceptably, IMO. The gloss is in the surface, not the paint.
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Old 22-03-2013, 16:32   #14
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Re: Topsides paint disaster. HELP !

Quote:
Originally Posted by bstreep View Post
Just to throw my $0.02 in, after painting our deck with 2 part:

You will have to repaint - you won't be able polish this out acceptably, IMO. The gloss is in the surface, not the paint.
Thanks for that, I have paintd with single pack, I bought some 1000 grit wet and dry today and some medium compound so I am going to give it a try tomorrow, relaunch Thursday and rain forecast every day so I figure if it looks OK, go with it if not, I can flat it AGAIN and repaint later in the summer.
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