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Painting ones boat

Not a question just a report of a fatal mistake. We had the paint on our roof bubbling and badly stained by droppings etc. We deduced this required stripping and re-paint. Following advice read and paint manufacturer recommendation we stripped back to bare metal. A long job as removing the sanded surface kills sanding discs etc, and was eventually achieved using 4" blade paint scrappers; hard work but cleaner and successful. Paint application was 4 coats of primer, 2 coats of pre-coat (undercoat) and 2 coats of top coat. The final finish is quite good for an beginner. Whilst applying the pre-coat in the open air we noticed small specks of paint on the sides of the boat which we then had to clean off with white spirit and re-polish, not a quick job. To avoid this when applying the top coat we booking a polly tunnel paint dock and took the precaution to cover the sides with plastic dust sheeting secured at the edges. BIG MISTAKE. On removal of the sheeting after only 6 days we discovered the paintwork on the sides had 'bloomed' in random patches to ruin the paintwork. The paint manufacturer advises that this is not recoverable(T-Cut and polish won't touch it) and a repaint is now necessary.
The moral is be warned. Our attempt to save money by doing the work ourselves has cost us dearly. Lets hope we can now find a professional painter who will do a good job at a reasonable cost. We have all heard of customers who have paid a lot of money for a finish that fails within 12 to 18 months.

Asked by: John Boggis  | 12.12pm, Friday 12 October

WW says:

Sorry to hear about the problem.
Is the bloom due to trapped moisture, the paint fumes or the contact of the plastic sheet?

Rupert Smedley  | 1.59PM, Friday 12 October

Interesting, so fabric covers would have been better.

Rupert Smedley  | 10.20AM, Saturday 13 October

Readers say:

We contacted a major paint manufacturer who's paint we used on the roof and they indicate that the plastic draws any moisture from the paint and thus causes the 'blooming'. Using plastic sheeting in contact with enamel paint, it transpires, is a complete no, no.

John Boggis  | 9.40PM, Friday 12 October

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