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What paint?

I'd like some suggestions as to what paint and undercoat (other than expensive marine paint) I could use once I've rubbed down some rust and ready to repaint my boat.
Thanks. Rob

Asked by: robert statham  | 7.56pm, Monday 2 April

WW says:

If you are not planning to use marine paint, any good quality domestic external paint that is intended for use on metalwork should do the job.
Some paints, like Dulux Weathershield, are designed specifically for external use so it is tempting to use these in the hope that they will last longer. The only snag is that, while the top coat is oil-based, the undercoat is water-based. This means that it tends to dry rather quickly, particularly in warm weather, so brush marks are difficult to conceal. You could try using it over another oil-based undercoat but the results could not be guaranteed.
If you have any tins of different makes of paint in store, it would be a good idea to try some of them on a not-too-prominent area of the boat to see how you get on with using them before you commit yourself to buying a large quantity.
Incidentally, after you have rubbed down the rust spots, Hammerite No 1 Rust Beater is a good primer that should keep the rust at bay for a few years. And if any parts of the boat are aluminium or galvanised steel, make sure you use a non-ferrous primer.

Graham Booth  | 6.02PM, Tuesday 3 April

Another great product to use on rusted steel is Fertan, which is water-based, and converts any remaining rust to ferrous tannate; which is impervious to water and prevents any further rusting. It can then be coated with primers and undercoats/topcoats as normal.
It works well on oil rigs, where it is often used without a topcoat; a narrowboat is quite easy by comparison.

Mark Langley  | 3.02PM, Wednesday 4 April

The major difference between expensive marine or synthetic enamel paints and the cheaper domestic variety is the amount of pigment in the paint. This gives the painted surface a greater depth of colour and it will better resist the ravages of the weather. It is also difficult to find the bright primary colours that look good on boats within the standard household decorative paint ranges.
The time spent in painting a boat is considerable, and it is this that is the major cost of the job. Saving a relatively small amount on the paint could produce a result that does not last as well or look as good.

Rupert Smedley  | 8.26AM, Thursday 12 April

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