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  Single or two part paint?

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Author Topic:   Single or two part paint?
Brent posted 09-20-2001 01:12 AM ET (US)   Profile for Brent   Send Email to Brent  
I know there have some previous discussions on this subject but here goes anyway. I have been sanding and prepping the hull on my 13' and have gotten through most of the old coats of paint back to the gelcoat, there are some areas that I have patched and faired as well as some areas where the gelcoat is gone, just exposed fiberglass. I have been told by someone with more experience than I have to apply an epoxy two part barrier coat (two coats rolled and tipped) and then two coats of Sterling two part paint (rolled and tipped). Is two part paint the best choice overall? What about touch up and maintenance down the line? The boat will always be trailered, never left sitting in water for any long period of time. Does a barrier coat make better sense than two part primers?
Soho posted 09-20-2001 08:01 AM ET (US)     Profile for Soho  Send Email to Soho     
Brent,

My Whaler is out being painted at present, professionally because I was not sure that I could do a good enough job myself with the roll and tip thing - spent too long stripping old paint off and doing what you did to mess it up myself. At any rate, my painter is going to apply three coats of Awlgrip primer and three coats of paint. The primer is an epoxy base and is something of a barrier coat I would imagine. I am talking about topsides only though.

Answering your questions; yes the two part is the way to go for hardness and durability - no comment here on the Sterling product as I don't know enough about it, but it has been covered here under different threads - look back and I am sure you will find them.

Barrier coat - Probably would not hurt on the bottom just as a safeguard, but not sure why needed on the topsides. I applied the Interlux barrier coat 2000 series a number of years ago on my boats bottom and it was certainly easy enough. After that I would imagine that you could apply primer and two part to the top sides.

No idea about touch ups later down the road? Wondering about that myself.

This has been a bit rambling but hopefully helps.

Ciao,

Ron

maxdevon posted 10-10-2001 09:37 PM ET (US)     Profile for maxdevon  Send Email to maxdevon     
I too am restoring a 13' whaler. I found a great book which I will try to forward soon. Basically from the book's recommendation, I have been repairing large cracks and small holes (all 275 of them) with a 2-part epoxy. Bare fiberglass I build up with a 2-part epoxy fairing with fillers added to get the consistency I want. Yes, lots of sanding. I laid 4 layers of fiberglass along the keel alternating mat & cloth which really strengthened the cracks & breaks in the keel. Having never fiberglassed before, I was really nervous, but it turned out great. For paint I am using a 2-pary epoxy primer in which I will apply about 3 coats.

I have not decided on the top coat yet. The book agrees that the best is gelcoat, with awlgrip or emeron as 2nd best choices, but these 3 require the absolute best of conditions, preparation, tools, & skill to apply. The new polyuerethanes (my spelling is bad) are suppose to be really good and easy to apply. They are durable & have almost the shine as the gelcoats. Sure, you may need to apply a new top-coat every 5 years instead of 10 years, but the cost difference & headaches I think makes up the difference. Of course you still have that great primer coat of epoxy to protect the hull. email me at: roger.chandler@flightsafety.com if you like.

OutrageMan posted 10-10-2001 11:26 PM ET (US)     Profile for OutrageMan  Send Email to OutrageMan     
Interlux makes a free booklet that describes all of this very well. It can usually be found whereever their products are sold.

2 part epoxy paints can be done by hand, and are a VERY tough surface. Interlux's Interthane Plus is probably the most sold of these.

Additionally there are one part polys that will give similar asthetic results as 2 parts, but are not quite as durable, but are easier to apply. A product like Interlux Brightsides fits this bill.

I am in no way employed by interlux, nor do I have any monetary relationship with them. I just like their products.

Brian

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