Removing stain

[steve6367]

I have a stain on one side deck below and window...........I have been able to get it off the flat areas of gel coat with G3 compound...........any ideas for getting it out of the moulded non slip pattern? I have tried starbrite non slip deck cleaner, Cif, washing up liquid and lots of scrubbing!

The boat is new to me so I don’t know what caused it for sure, however it seemed to come from the windows...............so I am suspected something like creeping crack cure that may have been used on the window..........

Any thoughts appreciated!

 

[Poignard]

How about oxalic acid? Available in chandlers under the brand name of Y10 [if you don't want to track down the raw oxalic acid]. Test on a small area first!

 

[boatbuilder]

Get your oxalic from your local pharmasist, much cheaper than Y10.

 

[Lakesailor]

Or Astonish oven cleaner. Safe for grp and muck cheap. If it doesn't work, it'll still clean your oven.
If you can't find it in a hardware shop, try Wilcos.