Little black marks

Hi nixy30633,

Personally, I would brush on the solution of crystals and water and let it dry out.  If after a few days, the black marks are still there, then I would repeat the procedure, as many times as necessary, until you are satisfied with the result. Once you are happy with the job, then you should use the neutralising spirit and leave it to dry out again.  I suppose that there will be some marks which will never come out no matter how many times you repeat the procedure, it just depends how bad they are. I am not an expert on this subject but I once refurbished a wooden Enterprise and the method worked for me.

Ian  (Yorkshire Dales S.C.)

You should be OK with 4:1, best to trial on a non-obvious place

There are also commercial products that contain oxalic acid, but are "safe" to use.

I have used Net-rol in the past and there's info on another product,TBS, over on the Classic and Vintage Racing Dinghy Association's forum. This link should take you to the relevant thread

Its good stuff, mix it warm water and be careful as its quite bad for you!

Yeah I have a similar problem on my sisters boat but the boat is epoxyed instead of varnished can i this just be sanded back in the same way or not?

All of these black bits have been caused by chips in the epoxy. I just want to remove the colour before covering them up, do i just do the same as was advised for stuart.