Print Page | Close Window

Laying up Epoxy then varnish

Printed From: RYA National Hornet Association
Category: Public
Forum Name: Technical
Forum Description: Discussion area for technical topics
URL: http://www.hornet.org.uk/forum/forum_posts.asp?TID=979
Printed Date: 14 December 2017 at 20:47
Software Version: Web Wiz Forums 10.18 - http://www.webwizforums.com


Topic: Laying up Epoxy then varnish
Posted By: sven_8t4
Subject: Laying up Epoxy then varnish
Date Posted: 05 May 2013 at 21:56
How many coats of epoxy is reccomended then how many of varnish over the top?

Also is it better to thin the first epoxy coat to let it 'soak' in?

2100's varnish is in need of freshening on the decks as their looking a bit dull and just starting to lift at the edges.


-------------
'Renaissance' Hornet 2100



Replies:
Posted By: sven_8t4
Date Posted: 05 May 2013 at 22:04
http://sphotos-d.ak.fbcdn.net/hphotos-ak-snc6/247483_10151582587663258_1907016540_n.jpg

-------------
'Renaissance' Hornet 2100


Posted By: roger
Date Posted: 06 May 2013 at 18:22
For the best job I would take back to bear wood with hot air gun and sharp scraper then re varnish but at this time of year patch it up and go sailing.

-------------
K191 Shoestring
595 Demon


Posted By: Strangler
Date Posted: 09 May 2013 at 16:32
Down to bare wood, flush any damp bits with fresh water to get the salt out. Its the salt causing the damp. One coat of epoxy, Blue Gee recommended - no waxy deposit. Hot air gun in one hand to heat the wood, brush in other to paint epoxy onto hot wood. One coat enough. Then 2 pot varnish, 4 coats?


Posted By: sven_8t4
Date Posted: 12 May 2013 at 20:34
Thanks Strangler sounds like a plan!





-------------
'Renaissance' Hornet 2100


Posted By: Steve Cooke
Date Posted: 20 May 2013 at 10:24
I did the inside floor of mine just recently (which is why I missed Carsington). I went back to bare wood with a hot air gun and scraper which helps dry out the wood, using oxalic acid solution to bleach out most of the black discolouration (as Strangler says, wash the residue off ), then used SP320 with slow hardener (wish I'd used the fast at this time of year) putting on 2 layers to give a really deep final finish as recommended by Paintcraft, but make sure the temp is above 12deg C for the wood and the air around while it's curing. After 24 hours light dry sand with 240 grit between coats to flatten the major bumps and give a key (wipe with a tak rag), or if you can time it right do the second coat while the first is not quite set - difficult to judge unless you've tried before. Leave as long as you can as the epoxy can keep curing for up to 6 months! Then 2 coats of 2 pack varnish with a flattening rub down between again (don't forget the tak rag).Most professional boat finishers seem to rave about Epifanes but whether that's because it's cheaper I don't know, but I used International Perfection brushed. It does flow out very well but consider using a roller or pads for large flat areas unless you're going to spray, but be very careful with that as the stuff and it's thinners are not very nice. Any non-slip areas mask off and put on a third coat - extra wear - and sprinkle granulated sugar carefully. After the first capsize the sugar washes away and there's a lovely grippy finish! You could alternatively just sponge it away! With the right weather and the right hardener you could be all done in 3 days - day 1 two coats of epoxy, days 2 and 3 one coat varnish each; scraping time obviously depends on what's on there and how much of the boat you're doing. It took me 5 days in total to scrape the inside of a Goodwin with crew deck up to the mast foot but I did do the whole lot in two separate operations over a year! It took me two days to remove all the fittings, which must have been there since the boat was built as they were held on by imperial screws, and some had to be ground off and drilled out! Much quicker refitting all the new ones. Hope it helps.

-------------
More power, more prizes, more pain, more glory


Posted By: sven_8t4
Date Posted: 09 June 2013 at 15:56


First Coat of epoxy on.....


-------------
'Renaissance' Hornet 2100



Print Page | Close Window

Forum Software by Web Wiz Forums® version 10.18 - http://www.webwizforums.com
Copyright ©2001-2014 Web Wiz Ltd. - http://www.webwiz.co.uk