Reply
 
Thread Tools Search this Thread Display Modes
 
Old 11-16-2018, 01:48 PM   #1
Senior Member
 
City: Warwick RI
Country: US
Vessel Name: Lollygag
Vessel Model: 34 Mainship Pilot Hardtop
Join Date: Aug 2016
Posts: 196
Changing bottom paint color

My wife (the Admiral) would like to change the color of the bottom from the current black to green. Besides sanding and cleaning is there anything else i shoudl do? or does this require soda blasting? I was hoping to do the work myself. Any thoughts or suggestions are appreciated.
__________________
Advertisement

Lollygag1 is offline   Reply With Quote
Old 11-16-2018, 02:02 PM   #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: 5,803
What type of bottom paint is currently on the boat? If it is an ablative paint, just pressure wash the bottom really good and if the present paint is well adhered then paint with the new ablative paint. If you have blistering, it is a whole different story. My current bottom paint is a blue ablative and I am going to go to black. By having the blue under the black it will tell me when it is time to add more black when the blue starts to show through.
__________________

Comodave is offline   Reply With Quote
Old 11-16-2018, 02:08 PM   #3
Senior Member
 
City: Warwick RI
Country: US
Vessel Name: Lollygag
Vessel Model: 34 Mainship Pilot Hardtop
Join Date: Aug 2016
Posts: 196
Black Interlux ablative paint. I thoroughly sanded and painted last spring, no blistering. Couple of spots need to be sanded but overall it looks fine.
Lollygag1 is offline   Reply With Quote
Old 11-16-2018, 03:32 PM   #4
TF Site Team
 
Bacchus's Avatar
 
City: Seneca Lake NY
Country: US
Vessel Name: Bacchus
Vessel Model: MS 34 HT Trawler
Join Date: Nov 2014
Posts: 2,931
Agree w/ Dave
Color change no different than putting on a fresh coat as long as you are using the same or compatible paint. Like he said the under color gives you an early warning when it's time to repaint.
I also changed from green to black so one of us must be going the wrong way??

That reminds me of a story - we were tearing up wall - wall carpet and refinishing hardwood floors when a neighbor stopped by...
Said they were in the process of having wall - wall carpet installed!
Same response... one of us is doing the wrong thing????
__________________
Don
2008 MS 34 HT Trawler
"Bacchus"
Bacchus is offline   Reply With Quote
Old 11-16-2018, 07:32 PM   #5
Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,359
If my girl asked me to change the color of the bottom paint, I'd say sure, you get to do the bottom job!! Just kidding, sort of.

Unless you strip it down to barrier coat or gel (which ever is under the b-paint), as the b-paint wears you will get blotches. Old color showing through new color. That looks pretty bad.

If you already need to strip it because of old paint buildup, then no issue at all changing color.
Ski in NC is offline   Reply With Quote
Old 11-16-2018, 07:40 PM   #6
TF Site Team
 
Bacchus's Avatar
 
City: Seneca Lake NY
Country: US
Vessel Name: Bacchus
Vessel Model: MS 34 HT Trawler
Join Date: Nov 2014
Posts: 2,931
Quote:
Originally Posted by Ski in NC View Post
Unless you strip it down to barrier coat or gel (which ever is under the b-paint), as the b-paint wears you will get blotches. Old color showing through new color. That looks pretty bad.
.
If you go through all the work to strip & start over w/ all one color - when it wears through you still have blotches except the white ? gel coat is the other color showing and there is NO anti fouling properties left.

Other than at the waterline it doesn't show - I guess I don't see the difference / problem.
I've read that some yards / pros recommend a different color as the first coat to act as a tell tale before all anti-fouling is gone.
__________________
Don
2008 MS 34 HT Trawler
"Bacchus"
Bacchus is offline   Reply With Quote
Old 11-16-2018, 07:48 PM   #7
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: 5,803
As soon as you see the first spot starting to show through, you know to put on another coat.
Comodave is offline   Reply With Quote
Old 11-16-2018, 08:18 PM   #8
Guru
 
City: Sydney
Country: Australia
Join Date: Jul 2015
Posts: 1,646
How often is your wife under the boat
suggestions ??? hide your wife's meds see if that helps
gaston is offline   Reply With Quote
Old 11-16-2018, 08:18 PM   #9
Senior Member
 
City: Albany, N.Y.
Country: US
Vessel Name: Tranquility
Vessel Model: Trojan F32
Join Date: Jan 2015
Posts: 104
Quote:
Originally Posted by Comodave View Post
As soon as you see the first spot starting to show through, you know to put on another coat.
This is exactly why a lot of people use two different colors.
kenk is offline   Reply With Quote
Old 11-16-2018, 08:48 PM   #10
Guru
 
Nomad Willy's Avatar
 
City: Concrete Washington State
Country: USA
Vessel Name: Willy
Vessel Model: Willard Nomad 30'
Join Date: Oct 2007
Posts: 16,097
I'm in the why would anybody use anything but red camp.
But I met a fisherman in Alaska that was sure black bottom paint had longer lasting AF properties.
__________________
Eric

North Western Washington State USA
Nomad Willy is offline   Reply With Quote
Old 11-16-2018, 09:13 PM   #11
Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,359
True, if you change colors you can see that last coat is wearing out. But if you paint same color over the old color, you don't get blotches. All same color. I paint mine (black ablative) when the grey-ish barrier coat shows through. Which it is already doing.

If multi colored I would have had blotches six months ago!
Ski in NC is offline   Reply With Quote
Old 11-16-2018, 09:24 PM   #12
Guru
 
City: Sydney
Country: Australia
Join Date: Jul 2015
Posts: 1,646
Has anyone mixed copper dust in bottom paint or chilli powder ? how did it go ?
gaston is offline   Reply With Quote
Old 11-17-2018, 02:46 PM   #13
Guru
 
Wayfarer's Avatar
 
City: Oneida Lake, NY
Country: USA
Vessel Name: Sylphide
Vessel Model: Kingston Aluminum Yacht 44' Custom
Join Date: Aug 2014
Posts: 1,479
One thing I can recommend is that you donít do what the previous owners of my old boat did. They painted over ablative paint with a hard shell paint. The result was big blotches of the hard stuff sloughing off. Not a good look.
__________________
Dave
Just be nice to each other, dammit.
Wayfarer is offline   Reply With Quote
Old 11-17-2018, 03:43 PM   #14
Senior Member
 
City: Warwick RI
Country: US
Vessel Name: Lollygag
Vessel Model: 34 Mainship Pilot Hardtop
Join Date: Aug 2016
Posts: 196
My wife has already agreed to paint the bottom. We tag teamed it last season, this year I will prep and she will paint. She was also the one to suggest we upgrade to a larger boat a few years ago. Keeper!
Lollygag1 is offline   Reply With Quote
Old 11-17-2018, 03:58 PM   #15
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: 5,803
She sure is a keeper.
Comodave is offline   Reply With Quote
Old 11-17-2018, 04:10 PM   #16
Senior Member
 
City: Warwick RI
Country: US
Vessel Name: Lollygag
Vessel Model: 34 Mainship Pilot Hardtop
Join Date: Aug 2016
Posts: 196
She does most of the cleaning too. Trade off is that she wants to drive all the time, I end up being the valet, park it and take it off the DOCK.
Lollygag1 is offline   Reply With Quote
Old 12-03-2018, 05:37 PM   #17
Veteran Member
 
Ftbinc's Avatar
 
City: Chicago
Vessel Name: Oma
Vessel Model: Manatee
Join Date: Sep 2016
Posts: 91
Smile

Quote:
Originally Posted by Lollygag1 View Post
She does most of the cleaning too. Trade off is that she wants to drive all the time, I end up being the valet, park it and take it off the DOCK.
She leaves you the fun stuff - driving, once i get outside the harbor is usually left to "Otto" the Auto pilot. I'll let my wife drive then anytime...
__________________

Ftbinc 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 06:08 AM.


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
×