Bare Bottom?

GregM
Tin star
Posts: 26
Joined: Sat Jul 22, 2017 5:01 pm

Bare Bottom?

Postby GregM » Sat May 02, 2020 4:50 pm

I found that I need to add some bottom paint to my 32 this afternoon. When talking to the marina owner he informed me the 32 that has been in the water for 30 years had a bare aluminum bottom. He said the guy had it stripped thinking the electrolysis spots are due to pin hole openings in the paint allowing the electric to focus on small spots instead of spreading out over an unpainted hull. Do you guys think there is any truth in that? Doesn't the coast guard run bare? Also I am thinking of going coal tar epoxy with the next round of bottom paint. That ablative stuff wears off way to fast and is very expensive. I am in the Ohio river so no salt issues, just muddy water.

User avatar
GB49
Aluminum Star
Posts: 128
Joined: Sat Jul 12, 2014 8:23 pm
Location: Catawba Island, OH.

Re: Bare Bottom?

Postby GB49 » Sat May 02, 2020 5:33 pm

Bottom paint is primarily for keeping the growth away from the hull. Paint or no paint you should be protected with anodes and proper DC & AC grounding. Also make sure your shore cords and your neighbor shore cords are healthy. I had a neighbor 2 boats down cause my galvanic isolator to buzz. Found out his plug was blackened/melted, putting voltage to the ground.

Never used coal tar but the ablative paint wears off on purpose.
1986 Sedan 32'. Twin Chrysler 360in^3, 275hp, with K&N flame arrestors.
Forum member since 1998, 1262 original forum posts.

jralbert
Site Admin
Posts: 711
Joined: Fri Jul 11, 2014 9:15 pm

Re: Bare Bottom?

Postby jralbert » Sat May 02, 2020 10:33 pm

""...Paint or no paint you should be protected with anodes and proper DC & AC grounding. ..." Amen to that

Painting well will save you money. A cruddy bottom will make the engine work harder to maintain speed and that means fewer mpg. Get the appropriate paint with anti-fouling properties. Lots of past threads here on what's best
-joel-
former owner 1988 '32 FB Sedan
Chesapeake Bay
twin 318 / 240 hp
Potomac MD

Fastjeff
Site Admin
Posts: 1258
Joined: Sat Jul 12, 2014 5:06 am
Location: Rock Halll, MD
Contact:

Re: Bare Bottom?

Postby Fastjeff » Sun May 03, 2020 6:29 am

..."Bare Bottom". I resisted, I resisted!

It all depends on where you boat. On interior lakes, especially in the South, people get away without A/F paint, but not where I boated! Even with a yearly coat of Trilux the boat would be covered with barnacles--one year--and a green slime the next, unless we took it out every week to rub it off at speed.

One time I left the boat unused for a few weeks, and it was mess: needing more throttle to maintain cruise speed, and it was logy and vibrating. Got so bad I intended to do something about it since we were on a trip at the time and this was lousing it up.

Anchoring in shallow water, I took my 1 1/2 inch putty knife and scraped the ENTIRE bottom of a 32 boat! It took an hour plus, and I swallowed a bunch of water doing it, but the boat was back!

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

User avatar
bcassedy
Royal Aluminum Star
Posts: 396
Joined: Sun Jul 13, 2014 10:05 am
Location: Aurora, In.
Contact:

Re: Bare Bottom?

Postby bcassedy » Sun May 03, 2020 10:27 am

Jeff,

I'm guessing your anchorage to clean/scrape the bottom was in fairly stable conditions (no / minimal muck).

Starting a new thread on bottom cleaning processes used by members.

Bill
Bill & Sharon Cassedy
"Sunset Seeker"
'88 32' Sedan Bridge
Located in Aurora, In.
Twin 318cu in Chrysler
1.5:1 Velvet drive trannies
Fresh water only

Fastjeff
Site Admin
Posts: 1258
Joined: Sat Jul 12, 2014 5:06 am
Location: Rock Halll, MD
Contact:

Re: Bare Bottom?

Postby Fastjeff » Sun May 03, 2020 1:51 pm

Dead calm water (Still Pond Creek) with a nice sandy bottom. Still, it was a dog of a job!

At the end of the season all boats hauled out at my marina got pressure washed.

Jeff
"We live at the bottom of an ocean of air, not at the top." General Marvage Slatington

Bryank97
Tin star
Posts: 35
Joined: Sun Sep 15, 2019 2:35 pm

Re: Bare Bottom?

Postby Bryank97 » Sun May 03, 2020 7:30 pm

Pluckebaum Custom Boats, also aluminum only paints around the sides just for looks. The bottoms are bare aluminum unless the boats were expected to be in salt water. Also Coal Tar epoxy is extremely durable and will probably be my choice when my paint starts looking thin. I see no issues leaving them bare, maybe just a little slime/growth
1988 Marinette 32 Sedan
Pittsburgh, PA


Return to “Paint”