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25-10-2016, 18:48
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#1
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Registered User
Join Date: Jun 2015
Location: Panama City, Fl
Boat: Morgan Out Island 33
Posts: 38
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Severe Oxidation of Paint
I bought a used fiberglass sailboat. Red. Previous owner had terminal cancer and boat was neglected 3-4 years. Paint is very oxidized. Wanted to PoliGlow the boat but even using PoliGlow HD prep, there is still a lot of oxidation.
Any suggestions about products and/or methods would be appreciated.
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25-10-2016, 20:18
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#2
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Moderator
Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 21,135
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Re: Severe Oxidation of Paint
Try wet sanding with 600 or 800 grit to remove the oxidation... worked for us on very bad gel coat followed by Poly-glow.
BTW, sure that it is paint, not gel coat??
Jim
__________________
Jim and Ann s/v Insatiable II, lying Port Cygnet Tasmania once again.
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25-10-2016, 23:00
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#3
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Registered User
Join Date: Feb 2016
Location: USA
Posts: 489
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Re: Severe Oxidation of Paint
You could try this. Depending on the severity of the oxidation. The photo is just an example of one of the less expensive brands. Test a spot though and wash/dry it really good after. Some compounds leave a residue which appears bristol until the residue washes away. And others are too harsh and will leave you with swirl marks. I've witnessed top notch results with the wet-sand approach that has been mentioned earlier.
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26-10-2016, 11:34
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#4
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Registered User
Join Date: Jan 2008
Location: SF Bay Area (Boat Sold)
Boat: Former owner of a Valiant V40
Posts: 1,141
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Re: Severe Oxidation of Paint
Suggest you start with the least abrasive approach first, and only get more aggressive if you really need to. A good low-speed polisher will make the job a lot easier, but it can be done by hand. You can certainly use less expensive automotive products, don't really need the more expensive marine varieties.
Polyglo and other similar products can work, but be aware that they may seriously affect your ability to paint in the future.
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26-10-2016, 12:02
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#5
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Registered User
Join Date: Aug 2006
Location: Skagit City, WA
Posts: 25,453
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Re: Severe Oxidation of Paint
Are you sure it's paint? Gel coat oxidizes a lot. Especially colors like red. If it's gel coat you are in luck, it can be compounded to bring back shine. Although it may depend on how thick the gel is....
__________________
"I spent most of my money on Booze, Broads and Boats. The rest I wasted" - Elmore Leonard
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26-10-2016, 12:26
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#6
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Moderator
Join Date: May 2008
Location: cruising SW Pacific
Boat: Jon Sayer 1-off 46 ft fract rig sloop strip plank in W Red Cedar
Posts: 21,135
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Re: Severe Oxidation of Paint
Quote:
Polyglo and other similar products can work, but be aware that they may seriously affect your ability to paint in the future.
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I have not found this to be true. Polyglow comes off fairly completely with alkaline based cleaners, and leaves a paintable surface.
Jim
__________________
Jim and Ann s/v Insatiable II, lying Port Cygnet Tasmania once again.
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26-10-2016, 12:48
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#7
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Registered User
Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41
Posts: 3,857
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Re: Severe Oxidation of Paint
Maine Sail has an excellent article on how to restore the luster to gelcoat. I used his expertise and the difference is amazing.
__________________
Fair Winds,
Charlie
Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
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26-10-2016, 12:52
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#8
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Registered User
Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41
Posts: 3,857
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Re: Severe Oxidation of Paint
Here is the boat after sanding but prior to cutting and polishing. Sorry it is upside down don't know how to fix this.
__________________
Fair Winds,
Charlie
Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
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26-10-2016, 12:54
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#9
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Registered User
Join Date: Jan 2008
Location: SF Bay Area (Boat Sold)
Boat: Former owner of a Valiant V40
Posts: 1,141
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Re: Severe Oxidation of Paint
Quote:
Originally Posted by Jim Cate
I have not found this to be true. Polyglow comes off fairly completely with alkaline based cleaners, and leaves a paintable surface.
Jim
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Very good to know. I've avoided Polyglow because of reports I've read.
Thanks
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26-10-2016, 12:54
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#10
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Registered User
Join Date: Mar 2006
Location: Nevada City. CA
Boat: Sceptre 41
Posts: 3,857
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Re: Severe Oxidation of Paint
__________________
Fair Winds,
Charlie
Between us there was, as I have already said somewhere, the bond of the sea. Besides holding our hearts together through long periods of separation, it had the effect of making us tolerant of each other's yarns -- and even convictions. Heart of Darkness
Joseph Conrad
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