Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-02-2019, 11:10 AM   #1
Newbie
 
City: Punta Gorda, FL
Country: USA
Join Date: Feb 2019
Posts: 3
Bottom Paint

I had been a sail boater for over 30 years until I bought our Mainship 430. Sailboats generally have a barrier coat of paint under the bottom paint. I need to get 20 years of paint off the Mainship and will have it sodablasted before painting again. My question is do trawlers (specifically Mainships) have a barrier coat? My broker says they do not. Applying a barrier coat is twice as expensive as bottom paint.

John Welsh
__________________
Advertisement

DrWelsh is offline   Reply With Quote
Old 03-02-2019, 11:53 AM   #2
Guru
 
Comodave's Avatar
 
City: Au Gres, MI
Country: US
Vessel Name: Never Say Never
Vessel Model: President 41 DC
Join Date: Jul 2015
Posts: 3,441
I would not go with sandblasting but rather soda blasting. Sandblasting is much more aggressive and if the operator isn’t really good it can easily damage the hull. As to barrier coating, absolutely! Now is the time to do it if it does not have a barrier coat already. It is easy to do technically but can be hard on your back. Contact Interlux and find out how much epoxy barrier coat you need to use on your boat and then use at least that much. The number of coats is not the determining factor because my coat may be thicker or thinner than your coat, but rather the number of gallons of paint. Keep coating the hull until you use up the proper number of gallons. It is critical to recoat at the proper time or else you will have to sand in between coats. Then you apply the bottom paint at the proper time so you don’t have to sand before the bottom paint. I do my own bottom painting, it isn’t too hard except the crawling around part. Good luck.
__________________

Comodave is offline   Reply With Quote
Old 03-02-2019, 12:08 PM   #3
Guru
 
O C Diver's Avatar
 
City: Fort Myers, FL... Summers in Crisfield, MD
Country: USA
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 6,704
You absolutely want barrier coat under bottom paint. There are tables that will tell you how many gallons of barrier coat to develop the proper mil thickness. The best application technique is to roll on thin coats. Alternating colors allows you to see if you missed any spots. There are 4 thin coats on my hull which gives uniform thickness and complete coverage. This is a job you will likely only do once. Worth the effort to do it well!

Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
O C Diver is offline   Reply With Quote
Old 03-02-2019, 01:25 PM   #4
Guru
 
djmarchand's Avatar
 
City: Litchfield, Ct/Punta Gorda, Fl
Country: USA
Vessel Model: Atlas Pompano 23- outboard
Join Date: Aug 2012
Posts: 4,335
The Mainship factory does not put barrier coats or bottom paint on the boats that they ship to dealers. The dealer will do it, often as part of an all inclusive "commissioning" add on. Most responsible dealers will do a barrier coat, but maybe some don't.


David
djmarchand is offline   Reply With Quote
Old 03-02-2019, 01:27 PM   #5
Senior Member
 
City: Marion, Massachusetts
Country: United States
Vessel Name: Wanderer
Vessel Model: Pilgrim 40
Join Date: Sep 2016
Posts: 248
Bottom Paint

Second all the above. Each paint is a little different as to cost, number of coats needed and application techniques. Yes, you want to avoid sanding between coats! I remember when I went through this process. All the info is on the web. Page 13 of the 2018 Jamestown Distributors Catalog has a list of barrier coat products and prices. Then go to the tech info on the manufacturer site to see how many coats and what the application process is. They are all different. Good luck!
PMF1984 is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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





All times are GMT -5. The time now is 01:16 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012