Painting the hulls – Scrape • Sand • Paint

 

Well, I have finally done it. I’ve gone and painted my topsides.
And prepped my hull for a new generation of anti-foul.

This is a major milestone for me. Tiare has needed a hull repaint for a number of years, slowly becoming a little more drab with each small knock the tender makes on the side, and with the passing of time wearing thin the top-paint.

Now that she is on the hard, and I have access to some high quality and affordable paints, along with the time to spend on doing the preparation work. It feels good to take my time to do it right.

This was my first repaint and a steep learning curve, I  definitely acquired some new skills. Paint scraping is an art, sanding and painting is a trade.

Doing it right means I take all the old anti-fouling off, scrape and sand back to the hull’s base coat, and then apply several layers of super smooth epoxy coating before a final coat of a modern super slippery, long lasting anti-foul.
I have not yet decided on the final anti-fouling system, there are a few options available but I will make that decision closer to when I re-slip Tiare.

Took longer then I had anticipated, as my hands seized up daily after four to five hours due to  Carpal tunnel syndrome.
If you’re my age, and a tradie, you’ll know what I mean. If you’re reading this and you’re young, look after your hands!! Waking up every night at 2am, with your arms and hands on fire gets tiring real quick.
So although one hull side would take around 18 – 20 hours total to scrape clean, it would actually take around 5 days. And there are four sides!
Fortunately, we have an onsen/spa (hot baths) close by, a soak after a day of scraping felt really good and made the CTS manageable.

I didn’t do a roll and tip, as that really only works well with paints that are thinned out. Thinning out a paint reduces its gloss and you need to put more coats on to make up the thickness.
What I did was a coach or carriage style as it allowed me to put on just four thick un-thinned coats of top paint.
I wasn’t going for a mirror finish, as that takes considerably more effort in sanding and preparation, I think my hands would have failed if I had tried, and then there is the stress over the final application of the top coats.
What I wanted was multiple coats of solid un-thinned top paint of at least 3 coats (I ended up with four coats).
I am very happy with the results.

Marine Paints from CMP

For the epoxy primers and the top-sides finish coat, I have used CMP (Chugoku Marine Paints) here from Japan.
One of the deciding factors on using CMP was that they make their paint AND catalysers here in Japan.
When I order the paint it usually takes a week or so as they make it to order, it arrives very fresh 🙂 All 4kgs or 18kgs of it.
It is also inexpensive, e.g. 4kg of white is 6000¥ ~ 60 USD for a quality two-part urethane, with the top end Fluorex Finish at twice the price at around 12,000¥ ~ 110USD.
18Kg of epoxy primer, Bannoh 1500, was 12,000¥ ~ 110USD. 18 kg did four coats below the water line.

Links below

Coach painting

CMP – Chugoku Marine Paints
https://www.cmp-chugoku.com/global.html

Bannoh 1500 ( .pdf )
https://www.cmp-chugoku.com/library/global/pdf/brochure/bannoh1500_en.pdf

Fluorex Finish ( .pdf )
https://www.cmp-chugoku.com/library/global/pdf/brochure/fluorex_2p_en.pdf

Leave a Reply