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Go Back   SailNet Community > On Board > Gear & Maintenance > What do you add (to improve) your bottom paint?
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Thread: What do you add (to improve) your bottom paint? Reply to Thread
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Topic Review (Newest First)
01-29-2013 06:41 PM
MarkSF
Re: What do you add (to improve) your bottom paint?

Quote:
Originally Posted by chef2sail View Post
Wingnwing did some sort of copper bottom this year. Wonder how a copper bottom plate would work in a T Storm...YIKES
The safest place to be in a thunderstorm is inside a metal box, aka Faraday Cage, the principle being that the field strength inside a conductive box will be zero. So I imagine a copper-hulled boat would be pretty safe, just like a steel ship (provided you are INSIDE)
01-29-2013 06:38 PM
chef2sail
Re: What do you add (to improve) your bottom paint?

Quote:
Originally Posted by T37Chef View Post
I mix in Italian Truffles, in a pinch I use canned if I have to touch up in the off season
Thats why the pigs and dogs are always sniffing the bottom of your boat when its out of the water
01-29-2013 06:36 PM
chef2sail
Re: What do you add (to improve) your bottom paint?

Quote:
Originally Posted by chucklesR View Post
I add elbow grease.

You would think that someone would come up with a film thin layer of copper you could just epoxy on.
Seriously, multiple layers over the years of 60% copper based paint that sheds off. Why not just step back 200 years and do a copper platted bottom - or better yet copper/nickle?

Sort of like a gold leaf application (with copper), set in epoxy?
Wingnwing did some sort of copper bottom this year. Wonder how a copper bottom plate would work in a T Storm...YIKES
01-29-2013 12:22 PM
SHNOOL
Re: What do you add (to improve) your bottom paint?

Ok, I am on day number 6 (if you look at it in 8 hour day working chunks) of scraping the bottom paint (all 30 years of it) off my boat (pictures below)...

My keenly UNPROFESSIONAL opinion is, that bottom paint sticks fine to a properly prepared bottom. Meaning, roughed up Gelcoat, primed using a decent barrier coat, will allow adhesion just fine. Requiring stupid lots of man hours to get it off even after 30 years.

The places where paint came off easiest, is where the prior owners, just slapped paint on top of exposed gelcoat, where the barrier coat failed, or where there was damage, or (love this) where the pads were that the boat rested on (see square marks on the hull).



Where you see pink, it's the first layer of bottom paint on top of white barrier coat (apparently was red).
Where you see blue (ablative) is where someone patched portions of the boat, sealed with gray barrier coat, and painted ablative on top.
Where you see gray, it's repairs (fairing) added to the keel.

From this you can see where bottom paint has failed over the years.

For the record, I'll be sanding down to gelcoat, fairing, barrier coat in gray, then (since I am freshwater) doing VC-17 in 2 colors, Red and Original Copper. Yes Copper is an additive for our paint as well (as powder).
01-29-2013 12:14 PM
T37Chef
Re: What do you add (to improve) your bottom paint?

I mix in Italian Truffles, in a pinch I use canned if I have to touch up in the off season
01-29-2013 12:01 PM
pauloman
Re: What do you add (to improve) your bottom paint?

copper is sometimes added to epoxy to make an antifouling coating. I have often thought about adding the copper powder to chea bottom paint....... progressive epoxy polymers sells the copper powder.
01-29-2013 11:29 AM
PorFin
Re: What do you add (to improve) your bottom paint?

Blood, sweat, and tears...

Just like the rest of the boat...
01-29-2013 11:15 AM
sailortjk1
Re: What do you add (to improve) your bottom paint?

Copper.
My bottom paint comes with Copper Powder that I mix in the can.
01-29-2013 10:42 AM
algee
Re: What do you add (to improve) your bottom paint?

I tried stirring in a small package of a weed preventer powder that was highly recomended by a friend. Somehow it clumped up and the whole bottom looked like 20 grit sandpaper. I had to sand it all off and buy more paint to redo it! Not one of my better days. My friends comment was " I never saw that happen before"
01-29-2013 09:45 AM
chucklesR
Re: What do you add (to improve) your bottom paint?

I add elbow grease.

You would think that someone would come up with a film thin layer of copper you could just epoxy on.
Seriously, multiple layers over the years of 60% copper based paint that sheds off. Why not just step back 200 years and do a copper platted bottom - or better yet copper/nickle?

Sort of like a gold leaf application (with copper), set in epoxy?
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