Paint vs Gelcoat

mercurymang

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While waiting for the boating season to come to an end, I'm gearing up for what may be a full rebuild on my 74 ebbtide. Thanks to this site, I think I have most of what i need to get started on the fiberglass work. One question i have that I am still unsure of is this. My hull is pretty beat up and i think I may want to flip it, repair it and then gelcoat it. What is the conventional wisdom on applying gelcoat? Are there any good threads on this topic?
 

Gator1996

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Re: Paint vs Gelcoat

There are a few current restorations that have or are using gelcoat. Probably the most popular is Trooper's "'78 Ebko Lebaron-Therapy" Decker also gelled his was 1983 Deck Boat... I also re-gelled the entire hull, deck and cap of my Stingray project which can be viewed by clicking my sig. I read Morebass' thread "At the Gelcoat Stage, Please Help" he did a great job and I took a lot from it.

I can't speak for all but I cursed the day gelcoat was invented while I was sanding but now am very satisfied with how it turned out. I would be more than glad to offer advice from an amateur's standpoint. When expert advice is needed YachtDr. or Ondarvr are the go to guys. Good luck.
 

mercurymang

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Re: Paint vs Gelcoat

Thanks Gator. I'll start looking into those threads.
 

Woodonglass

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Re: Paint vs Gelcoat

Gelcoating takes a bit of specialized equipment. If you have a big enough compressor, a Pot Gun Sprayer, a Big Shop or Yard and don't mind Sanding till the Cows come home, then Gelcoat is a great finish for a boat hull. It's best when applied in a Mold (i.e. Factory) but the DIY Back Yard Boat builder can do a full Hull recoat with great results if you have the Patience to do it. I personally prefer painting but to each his own. Gelcoat is much more durable and resistant to scratching than paint so it's your boat and your decision. If you trailer your boat and don't do much beaching, Paint might be easier and take less time. JMHO.;)
 

mercurymang

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Re: Paint vs Gelcoat

Next question I had was that I am always seeing references to gel-coat not adhering to epoxy. Will that be a problem as I intend to do some fiberglass work on the hull to repair some gouges and dings/
 

Woodonglass

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Re: Paint vs Gelcoat

You will need to use Polyester Resin to do your repairs. To fix gouges, a good "Fairing Compound" is 500 ml of Poly resin, 500 ml of Glass Bubbles, and 250 ml of Cabosil. Pour into a large plastic bowl and Mix for about a minute till its creamy smooth. fill the deep scratches and gouges with a bondo spreader. It'll set up in about 20 minutes so work fast. Use 80 grit to knock down the rough spots then finish with 180 grit. Works Great. Wash out the damaged areas first with Acetone and remove any loose gelcoat first.
 

Gator1996

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Re: Paint vs Gelcoat

The setup I used is outlined in my thread but it was nothing special I did not use a pressure pot, just a HVLP from Northern tool and a 33 gallon craftsman compressor that makes 6 CFM at 90 psi. Now the general consensus may be that my results were junk and if that's the case just ignore me.

I did three colors, that increased the difficulty in both the planning, the execution of the actual spraying and the post work. If I had gone all white or off white, whatever. I would have finished in a week I expect. The blue and orange were tough to avoid sanding through or showing scratches in. Plus mixing pigment into neutral gel was messy and a real pita. Overall, I sprayed, resprayed and sanded for a month. Probably an average of 6 hours a day.

Although I had read a hundred times, "gelcoat is not like paint" I still went at it at first like I was painting, I think some others have done the same. If you go into it knowing that you can't treat gel like paint, you'll be a step ahead of most. Spray it on thick and then get to sanding. I'm sure you will find that gel is very forgiving, I did mine in my driveway, no protection from bugs, leaves etc. but it all sanded out in the end.

I am not an expert in the gel and epoxy relationship, I have also heard that gel won't adhere to epoxy but have heard others that know a lot more than me say it can be done. I didn't use epoxy on my project so can't personally say either way. I do know that the subject has been addressed many times in this forum so maybe do a search of the threads and you will likely get the info you need.
 
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Trooper82

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Nov 21, 2011
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Re: Paint vs Gelcoat

Gator has you covered....it aint paint!

Although I did not use a guage when I sprayed(both times) I would say that was one of my biggest mistakes...I will agree it is very forgiving...once I am able to get back on my project I will find out how forgiving when it comes to touching up areas I sanded a little too thin...I have to agree it is a very nice looking finish too..
 
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