Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 24-02-2012, 12:47   #1
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Hull Painting

I'm sure this has been discussed many times, but here goes....

I'm planning to repaint my hull this spring when it warms up a bit. I will be sand blasting down to bare shiney steel until noon or one pm then paint until the blasted area is covered. Repeat the next day and so on until I'm done.

My question is about cleaning the steel after blasting,prior to painting, what product to prime with, the faring material , top coat? above and below the water line products? Basically how would you do it if this were your boat you planned to keep for a long time?
__________________

__________________
Matt sachs is offline   Reply With Quote
Old 24-02-2012, 13:02   #2
Registered User
 
sy_gilana's Avatar

Join Date: Jan 2005
Location: On board
Boat: Van de Stadt 50'
Posts: 1,101
Send a message via Skype™ to sy_gilana
Re: Hull painting

My hull is Inorganic Zinc coated so I have never gone to sandblast. I would blow clean the hull, then 2 coats of Sigma 7416 Hi solids epoxy Aluminum primer, then two coats of their Epoxy Tar (BREA) then two coats of their TCN Tiecoat. That is the bottom we currently have on. Then we have up to 8 coats antifouling and huge anodes. Pictures on our web page in the 2006 section. Good luck!
__________________

__________________
Tight sheets to ya.
http://gilana.org
sy_gilana is offline   Reply With Quote
Old 30-03-2012, 13:45   #3
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

After spending more time waiting on my air compressor to catch up than actually sand blasting, I went out and found a "real" air compressor. It needed some work. It was loaned to me if I repaired it. So I fixed it, and OMG 200CFM @ 125psi is freakin awesome. I need a bigger sand blaster now.
Just my luck, its going to rain this weekend.
__________________
Matt sachs is offline   Reply With Quote
Old 30-03-2012, 14:41   #4
Registered User

Join Date: Jan 2009
Boat: Tartan 37 #6
Posts: 326
Re: Hull Painting

Matt,have fun, its a shi**y job ! Do make sure nobody touches the bare steel before you prime it, hand sweat/grease will affect the paint bond. Bruce.
__________________
steamgoat is offline   Reply With Quote
Old 30-03-2012, 15:26   #5
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

Thanks for that, I didnt know. Whats the best way to get the dust off before you paint? air hose?
__________________
Matt sachs is offline   Reply With Quote
Old 30-03-2012, 15:43   #6
Registered User

Join Date: Jun 2010
Posts: 523
Re: Hull Painting

Quote:
Originally Posted by Matt sachs View Post
Thanks for that, I didnt know. Whats the best way to get the dust off before you paint? air hose?
Rub with a dry rag while using air hose, then wip down with a rag and thinners. At least that is what i did on my Roberts when i still had it, but others may have better suggestions.
__________________
2 Dogs
justwaiting is offline   Reply With Quote
Old 30-03-2012, 15:51   #7
Registered User

Join Date: Mar 2009
Location: Australia, Central Coast.
Boat: Boden 36 Triple chine long keel steel, named Nekeyah
Posts: 776
Re: Hull Painting

Just blow the dust off - don't touch it with anything. If you use a rag you risk leaving cloth fibres in your nice new profile.
You may find that half a day is a little long between blasting and painting, but it will depend on humidity.
What sort of grit are you using?

Regards,
Richard.
__________________
boden36 is offline   Reply With Quote
Old 30-03-2012, 16:12   #8
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

Silica free Black Diamond 60/80 grit.
__________________
Matt sachs is offline   Reply With Quote
Old 30-03-2012, 16:15   #9
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Hull Painting

Make sure your air is carefully separated with at least two filters before very thoroughly blowing off. Any oily moisture you may blow out of the compressor tank will really ruin your day without proper filtering.
__________________
minaret is offline   Reply With Quote
Old 31-03-2012, 16:09   #10
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

Thanks for all the advice. I currently have moisture separator in line. Do I need another? I really really don't want to screw this up!
__________________
Matt sachs is offline   Reply With Quote
Old 31-03-2012, 17:29   #11
Registered User

Join Date: Nov 2011
Location: Montegut LA.
Boat: Now we need to get her to Louisiana !! she's ours
Posts: 3,421
Re: Hull Painting

Ive always used acitone as a wipe down before spraying anything on a striped hull! at least thats what I did the few times I had to on my Colvin! seemed to work for me wiped it and blew it off again! and sprayed what ever I was useing at the time ! theres so many other paints out there now that I would have to talk to some boat painters about what to us nowdays things have changed alot in the last 10 yrs since I sold her !! But steel is still steel I guess!! so I would ck with some of the pros on here like Minaret hes still in the boat repair and painting bizz Im sure hes up to date !!
__________________
Bob and Connie
bobconnie is offline   Reply With Quote
Old 03-04-2012, 15:01   #12
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

I put in a second air / water seperator, and son-of-gun, I'm getting a little moisture in the second seperator. Once again, thanks Minaret for the sound advice.
What are your thoughts about a faring material to apply over the primer to fill in a few of the ugly areas?
Then whats your opinion about the next steps....(hows that for an open-ended question??) Thanks again.
__________________
Matt sachs is offline   Reply With Quote
Old 03-04-2012, 15:08   #13
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Hull Painting

Quote:
Originally Posted by Matt sachs View Post
I put in a second air / water seperator, and son-of-gun, I'm getting a little moisture in the second seperator. Once again, thanks Minaret for the sound advice.
What are your thoughts about a faring material to apply over the primer to fill in a few of the ugly areas?
Then whats your opinion about the next steps....(hows that for an open-ended question??) Thanks again.

Yea I usually run 3, one one the compressor itself, one after at least 25' of line to allow for condensation, and one right before the final line. But I am often running 100'-200' of hose off a filtered manifold. All filters always have moisture, getting a really dry airstream requires daily tank draining and good separating/filtering.
What primer did you use?
__________________
minaret is offline   Reply With Quote
Old 03-04-2012, 16:25   #14
Registered User
 
Matt sachs's Avatar

Join Date: Jul 2010
Location: East Tennessee
Boat: 1989 50 ft Roberts
Posts: 859
Images: 18
Re: Hull Painting

Quote:
Originally Posted by minaret View Post
Yea I usually run 3, one one the compressor itself, one after at least 25' of line to allow for condensation, and one right before the final line. But I am often running 100'-200' of hose off a filtered manifold. All filters always have moisture, getting a really dry airstream requires daily tank draining and good separating/filtering.
What primer did you use?

PPG Amercoat 240. Thanks
__________________
Matt sachs is offline   Reply With Quote
Old 03-04-2012, 17:25   #15
Resin Head
 
minaret's Avatar

Cruisers Forum Supporter

Join Date: Aug 2007
Location: Seattle WA
Boat: Nauticat
Posts: 7,199
Images: 52
Re: Hull Painting

Use Amercoat 114A epoxy filler. Heres the PDS for your primer. http://ppgamercoatus.ppgpmc.com/prod...240_PDS_AI.pdf


Many people will use WEST with 407 for just about anything, this included.

__________________

__________________
minaret is offline   Reply With Quote
Reply

Tags
hull, hull paint

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Hull Painting Matt sachs Construction, Maintenance & Refit 26 20-03-2013 10:57
Hull Deck Seam Damaged and I Need Help Karmacal Construction, Maintenance & Refit 59 28-02-2012 12:42
Need Help on Hull Construction RaySea Lady Construction, Maintenance & Refit 19 25-02-2012 07:01
Opinions on this Hull ... sharpey Construction, Maintenance & Refit 1 24-02-2012 02:42
Possible Hull Integrity Problems ... What do you think ? (with pics) SeaSloth Construction, Maintenance & Refit 13 23-02-2012 20:20



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 11:40.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.