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Catalina/Capri 25/250 Sailor's Forums

Catalina 250 Specific Forum

Yellow Discoloration

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piseas
Former Treasurer

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USA
2017 Posts

Initially Posted - 09/28/2007 : 12:17:39

I have a 2003 and have noticed several yellow discolorations on the starboard side of the hull and on the outside port coaming. I have tried several products to remove marking but they wont come off. Has anyone noticed this and had any sucess in removing?

Previous Owner
PiSeas II
2003 C250 WK #692
Newport Beach, CA

Edited by - on

zeil
Master Marine Consultant

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Canada
1314 Posts

Response Posted - 09/28/2007 : 12:28:14

Try toilet bowl cleaner... This was suggested to us by Jerry Mulvihill a year or so ago and worked perfect to remove hull waterline stains...

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frog0911
Master Marine Consultant

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USA
1349 Posts

Response Posted - 09/28/2007 : 12:47:47

Don't buy the expensive stuff. Go to the dollar store and buy a product call "The Works" get a big sponge and rubber gloves. Be sure and rinse well after use. By the way no scrubbing required.

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piseas
Former Treasurer

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Response Posted - 09/28/2007 : 15:03:02

Thanks guys. Even though stains are not waterline stains, I will give both a try over the weekend. Keep you posted.

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JohnMD
Navigator

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USA
207 Posts

Response Posted - 09/28/2007 : 16:15:52

I've also had a lot of luck using 'Black Steak Remover'. You can get it at WalMart in the RV section. It's an alkaline soap in a spray bottle that takes black streaks off of aluminum and fiberglass. It's cheap, too.

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piseas
Former Treasurer

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Response Posted - 09/28/2007 : 16:55:26

There is a Walmart next door to my office. They had both products which I bought. Let u know which one worked!

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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts

Response Posted - 09/28/2007 : 17:08:18

I've had extremely good results from FSR, but it's probably the same chemical makeup as some of the cheaper stuff you can find at Walmart. If those don't work, WM carries FSR (Fiberglass Stain Remover).

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piseas
Former Treasurer

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USA
2017 Posts

Response Posted - 09/28/2007 : 17:17:14

David, if the 2 products I got at Walmart dont work, I will try FSR. I went to WM.com and the 1 reviewer said that product didnt work and to try 409. Boy, I have never had so many choices. I love it.

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Arlyn Stewart
Master Marine Consultant

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USA
2980 Posts

Response Posted - 09/29/2007 : 06:18:27

Starbright offers a hull cleaner that is also excellent for this.

It is very important however to wax well after using one of these cleaners. The stains can be avoided by having a good wax on the hull and over time it will be noticed that they usually happen where the wax is worn off at drainage points off the deck. Any place missed by wax will also become a victim.

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britinusa
Web Editor

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5404 Posts

Response Posted - 09/29/2007 : 08:33:00

Steve, if the yellow is from exposure to seaborne pollution (which we see after every 4 day trip) then use Oxalic Acid, it is literally a wipe on wipe off product.
NOTE: Do not allow it to drip on galvanized metal!!!!! (It will forever look like bird poop.)

NOTE: After cleaning (and it really does work well) rinse well and do a wax job.

We use a shawalla type of mop to apply it wearing rubber gloves (My wife is a wannabe OSHA representative, so she would have me wear disposable coveralls, a power ventilated mask, life jacket (even with the boat at the side of the house on the trailer) steel toecapped shoes, protective eyewear and a hard hat.

I think I covered (pun intended) it all.

Paul

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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts

Response Posted - 09/29/2007 : 10:22:54

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Britinusa: Steve, if the yellow is from exposure to seaborne pollution (which we see after every 4 day trip) then use Oxalic Acid, it is literally a wipe on wipe off product.
NOTE: Do not allow it to drip on galvanized metal!!!!! (It will forever look like bird poop.)<hr height="1" noshade id="quote"></blockquote id="quote">

I'm pretty sure FSR is just oxalic acid in a pretty blue gel agent that helps it stick to the side of whatever you apply it to (and command a higher price). And yes, I got a couple of "bird poop" spots on my trailer while using it. Live & learn.

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piseas
Former Treasurer

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USA
2017 Posts

Response Posted - 10/02/2007 : 13:43:09

Just a follow up, I used the Black Streak Remover and it did lighten up the yellowing. Thanks for everyones tips.

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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts

Response Posted - 10/02/2007 : 14:18:13

<blockquote id="quote">quote:<hr height="1" noshade id="quote">piseas: Just a follow up, I used the Black Streak Remover and it did lighten up the yellowing.<hr height="1" noshade id="quote"></blockquote id="quote">

Not to beat a dead horse, but FSR (in my experience) doesn't lighten stains, it makes them go away. If you leave it on long enough, it'll turn your fiberglass back to snowy white. I used it on my nearly thirty year old San Juan 21 which had been sitting in lake water for five years, and the water line is pretty white (can't expect miracles).

On our Catalina I used it along the waterline, and it is virtually indistinguishable from the surrounding gelcoat. I'll probably have to redo it when we take the boat out of it's slip as I can already see an accumulation of yellow grime along the waterline after only a couple of months. I scrub the starboard side all the time because it's easy to get to, not so easy to reach the port side, I have to do it from the dinghy, or get a longer brush handle.

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britinusa
Web Editor

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5404 Posts

Response Posted - 10/02/2007 : 16:02:03

David, <blockquote id="quote">quote:<hr height="1" noshade id="quote">I can already see an accumulation of yellow grime along the waterline after only a couple of months.<hr height="1" noshade id="quote"></blockquote id="quote">

A couple of months! Says something about the water down here in Biscayne Bay! we can see yellow after a 4 night weekend trip!

paul

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delliottg
Former Mainsheet C250 Tech Editor

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USA
4479 Posts

Response Posted - 10/02/2007 : 16:17:31

<blockquote id="quote">quote:<hr height="1" noshade id="quote">Britinusa: A couple of months! Says something about the water down here in Biscayne Bay! we can see yellow after a 4 night weekend trip!<hr height="1" noshade id="quote"></blockquote id="quote">
Maybe it's because we're in a tidal river so the hull is "washed" on both sides by the river's flow and the twice daily ebb & flood of the tides, dunno.

OT: According to some of the denizens of our marina it gets interesting in the winter months when the river rises, and more logs and debris start coming down the river. I'll post a picture of the 8x12 beam we hit on our 2nd to the last trip out. Never saw it coming, whacked the bow, ran down the port side, then lodged under our dinghy for several hundred yards. Fortunately we weren't going very fast, so there was no discernible damage. I wonder how much flotsam & jetsam will accumulate around the boat since we're at the extreme downriver end of the marina, and the fairway basically stops at our slip like a giant funnel.

Oh, and Paul, your sig picture is busted. The underlying link works, but the picture itself isn't displaying.

Edited by - delliottg on 10/02/2007 16:24:44

piseas
Former Treasurer

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USA
2017 Posts

Response Posted - 10/02/2007 : 18:20:42

David, OK OK, will try FSR. But I did talk to the original owner and he said the yellow discoloration was on the boat when he bought new and that was a problems with many c250's. Mine is an 03 so not sure if on prior or newer years. Owner said it was in gelcoat. He was not able to remove but i didnt ask him if he used FSR.

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britinusa
Web Editor

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USA
5404 Posts

Response Posted - 10/02/2007 : 21:09:57

David, thanks. That server was taken offline Saturday for a week or more during major upgrades.

Fixed my sig, thanks for the heads up.

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willy
Captain

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USA
422 Posts

Response Posted - 10/03/2007 : 07:03:09

I so have to agree with Arlyn on this...when you get it off....WAX the area at least twice. I have had great success with Starbright with Teflon, although I am pretty sure the call it PTFE now instead of teflon...(Dupont trademark). Its really hard and sheds dirt and stains like no wax I've ever used.

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GaryB
Master Marine Consultant

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USA
4303 Posts

Response Posted - 10/03/2007 : 12:38:11

I was looking at an '87 C25 a couple of months ago and it had several yellow areas/spots around the boat about a foot above the waterline. I looked at these areas up close and they did not appear to be areas that had been repaired. Just looked like the gel coat had turned yellow in spots.

I've looked at a lot of Catalina's over the past few months and only saw these yellow spots on one other boat.

Did Catalina have some problems with their gel coat during the '80's?

Edited by - GaryB on 10/03/2007 12:40:05

piseas
Former Treasurer

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USA
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Response Posted - 10/04/2007 : 16:00:39

Gary, My 250 is an 03 and it has yellow discoloraton. Apparently they have been there from day one.

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