painting tinnny

[castlevar]

Hi
I have a steel boat some rust damage on the hull at rubbing strake any suggestions about how I can cure without using angle grinder.
Would hate to damage any boats beside me I have painted boat with 2 pack.

 

[BigART]

We use a Dremel with grinding wheel clean up small patches followed by epoxy. We have had little luck with patent cures which claim to turn the rust into something impregnable - it just starts to bubble up again, whatever you put on it. If you haven't used a Dremel before, I would recommend them, they look like toys but don't be fooled. They are amazingly powerful and flexible tools.

 

[AndrewB]

This is a perennnial problem - you need to strike a deal with your marina so there is some corner you can use for angle grinding. Alternatively with a generator or big inverter you can anchor off some place for this operation.

As an alternative for light rusting on an open surface, brushing with a heavy-duty wire brush fitted on the angle-grinder will clean the area without scattering hot iron filings, the bane of posh GRP. Even so, partial tenting is advisable. After wire-brushing until it looks clean, use a chemical de-ruster such as Kurust just to catch any last remains.

 

[castlevar]

Thanks for the suggestions thought someone mighy have a magic solution but it looks like a dremel or similar have also tried rust cure liquids with limited results

 

[Simes]

Have a chat with your local chemical company (or even your pharmacist) ask for Phosphoric acid. you are looking for between 50 on 80% solution. this will remove rust and almost any other stain with out damaging your paintwork. used it for years on GRP and on painted GRP with no damage.

Regards Simon

 

[castlevar]

Hi Simon
Have used phosphoric very good for removing stains but does not appear to kill rust occasionaly it appeares to work but i allways keep a bottle on board to keep stains off chains etc

 

[captcliveus]

Hi folks,I have a Tahitiana made of newcastle pine(steel) last summer i did the big blast off the hull I have written a essay and put it onto a cd rom with 200 pics about the whole operation. Tried the Hilti needle gun yet? or the wetblast sand option? email for a copy

 

[tugboat]

Hi Geoff I'm doing the exact same job at the moment, my rubbing bands are removed for a major refurb of the steelwork. I'm removing any major scale with a chipping hammer (used with care to avoid scarring the steel). Then I'm using a grinding disc to get down to fairly bare steel, followed by a flap disc (40 grit) for finishing. You need a pretty coarse grade, a finer grade can actually polish the rust without removing it. I don't know how bad your problem is, but if substantial you really need to use the decent equipment or you'll be there for ever. A Dremel type tool is only really suitable for very small patches. I have other boats on one side of me so I have to pick the right wind conditions, otherwise I would be obliged to rig proper screening/tent.