Archive for January, 2012

09 Jan 2012

Refit, Hallberg Rassey, Osmosis Treatment, Portimao

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After 14 months Rafiki II appeared out of the boatyard looking beautiful.

She has had osmosis treatment, new standing rigging and the engine was treated to a 5000 hour overhaul.

She had been fitted with a new teak deck only a few years earlier and this only required a good clean (no sanding)

The topside stripes were repainted and the original topside gel coat was polished up.

 

 

The first job was to blast the hull with sand to remove the old antifouling paint and uncover the gel coat.

What appeared  was mositure bleeding though the weakened gel coat

It is what we expected from the initial moisture readings so no one was really surprised

 

 

Now the rough stuff starts and a sand / slurry blast removes the gel coat and weak laminate.

A bit of manual grinding is also needed to shape out some weakened areas and expose some more material around the voids.

 

 

 

 

 

Voids are now opened up and thorough, repeated high pressure washing starts, then just leave to dry……….

That,s what is so great with Portugal, just leave her out and the hot, dry weather will do the job without the need for tents and hot vacs.

 

 

 

As would be expected the rudder required quite some rebuilding. Here we had wrap  fibre glass rovings around the leading edge of the rudder and substantially build up the deteriorated surface.

 

 

 

 

Some months later, giving her plenty of time to dry out, we can start the epoxy paint system.  Where there has been heavy grinding back and weakened  laminate repairs are carried out with fibreglass rovings to build up the surface.  Working in small manageable sections areas are wetted out, ensuring the resin  penetrates  the small voids and open laminate. Then epoxy  filler is applied. Once the entire hull has been coated it can be sanded down to take another fairing  filler.

 

 

 

A final sanding is carried out and then layers of epoxy resin are applied, again working in small sections so that the surface never dries out.

The epoxy paint system is applied when the temperature and humidity are at acceptable levels.

Finally the blue stripes were painted on, the topside gel coat polished up and the underwater hull primed to take antifouling paint.

 

 

Contractors:

Hull: Slick Hull

Engine and machinery: Bluewater Marine Serices

Rigging: Just Boats

Electrical: John Holloway