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Yellowing on gelcoat
HarleyFXDL	#1  Posted on 08/18/08 - 2:46 PM
Member Personal Page Project Albums Posts: 917 Comments: 30 Joined: 07/24/07	Can anyone advise as to why the gelcoat gets a yellow tint to it when you take it out on the water? What is the best way to clean it?
nh5	#2  Posted on 08/18/08 - 3:20 PM
Member Posts: 35 Comments: 0 Joined: 07/17/08	Everyone gets that after the boat is in the water. Mary Kate On Off takes it off. Sold at any boat store. I use it but be careful and cover up the trainer otherwise the strong acid in it will tear at the trailer and bottom paint. Edited by nh5 on 08/18/08 - 3:21 PM
HarleyFXDL	#3  Posted on 08/18/08 - 3:44 PM
Member Personal Page Project Albums Posts: 917 Comments: 30 Joined: 07/24/07	Acid? Isn't that bad for the gelcoat?
Phil T	#4  Posted on 08/18/08 - 4:02 PM
Administrator Personal Page Personal Album Project Albums Posts: 7043 Comments: 6 Joined: 03/26/05	I have noticed that once I buffed out and waxed my hull, the scum line is less prevalent. A good scrub with boat soap gets it off. Think you should buff her out! Yes, acids can be bad for gel coat. As you can see from the CRC Spec Sheet there are several acids. Used sparingly and cleaning the surface throughly will prevent serious damage. Be careful. 1992 Outrage 17 I 2019 E-TEC 90, Viper 17 2+ 2018 Load Rite Elite 18280096VT
nh5	#5  Posted on 08/18/08 - 4:07 PM
Member Posts: 35 Comments: 0 Joined: 07/17/08	I normally use on off like once or twice a year but I do a good wax twice a year also after I do it and that does seem to keep it off.
HarleyFXDL	#6  Posted on 08/18/08 - 4:52 PM
Member Personal Page Project Albums Posts: 917 Comments: 30 Joined: 07/24/07	So waxing the hull will remove the yellowing?
scrimshaw	#7  Posted on 08/18/08 - 5:22 PM
Member Posts: 437 Comments: 0 Joined: 09/09/07	The yellow/brown stains are caused fron Tannin in the water which comes from trees and vegetation. These stains are easily removed with a cleaner containing Oxalic Acid,I use Starbrite Hull cleaner,simply wipe on and it will disappear then rinse well.A spay bottle also works very well.
HarleyFXDL	#8  Posted on 08/18/08 - 6:11 PM
Member Personal Page Project Albums Posts: 917 Comments: 30 Joined: 07/24/07	Thanks Jim.
ioptfm	#9  Posted on 08/18/08 - 6:32 PM
Member Personal Page Posts: 1533 Comments: 3 Joined: 10/28/06	Do you know if the StarBrite will also damage the trailer? Tom 1979 Sport 15'
Phil T	#10  Posted on 08/19/08 - 6:26 AM
Administrator Personal Page Personal Album Project Albums Posts: 7043 Comments: 6 Joined: 03/26/05	Tom - I have read a comment from Finnigan that states the Starbrite hull cleaner will eat the galvanization off the trailer if not rinsed off. 1992 Outrage 17 I 2019 E-TEC 90, Viper 17 2+ 2018 Load Rite Elite 18280096VT
Erik Selis	#11  Posted on 08/19/08 - 6:43 AM
Member Personal Page Project Albums Posts: 71 Comments: 9 Joined: 10/12/05	Yes, the StarBrite hull cleaner with also damage the galvanization of the trailer. Always make sure your trailer is wet when using hull cleaners containing these types of acids. Rinse the trailer and hull thoroughly and wash with soap afterwards. Then rinse again. Try not to use these products too often. Like others have said, waxing the boat regularly will reduce the amount of staining. Erik