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BARGES: All about barges and barging - building, buying, maintaining, equipment, handling on the water, etc. (Public)
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TOPIC: Painting the hull to recover the shine.

Painting the hull to recover the shine. 30 Apr 2021 21:59 #122837

  • Michael Miles
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That's really useful. We now have 3 possibilities for a shiny black hull.
Hempathene, Teamac and Jotun pioneer.
If there are any more ideas please add to this list and let us know how in fact the products do after say 2 years. Balliol has already said that the Teamac BTV can be easily touched up if a scrape occurs.
Thanks for these recommendations.

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Painting the hull to recover the shine. 30 Apr 2021 17:26 #122833

  • John Frazer
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Martin Ling wrote: We dry docked and had the hull sprayed for our second time last October, and this time we had one coat of Hempathane polyurethane topcoat sprayed on top of the Hempadur epoxy: www.hempel.com/products/brand/hempathane/explore

If your yard prefers one of the other paint brands they are likely to have something similar available.

Only been a few months but I can report that it's currently still black and shiny so far. After our previous docking/spraying a few years ago with epoxy alone, it went gray and chalky within about eight months.

we use Jotun pioneer above the waterline on top of epoxy, quick drying and easy to touch up

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Painting the hull to recover the shine. 30 Apr 2021 14:37 #122827

  • Martin Ling
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We dry docked and had the hull sprayed for our second time last October, and this time we had one coat of Hempathane polyurethane topcoat sprayed on top of the Hempadur epoxy: www.hempel.com/products/brand/hempathane/explore

If your yard prefers one of the other paint brands they are likely to have something similar available.

Only been a few months but I can report that it's currently still black and shiny so far. After our previous docking/spraying a few years ago with epoxy alone, it went gray and chalky within about eight months.

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Painting the hull to recover the shine. 29 Apr 2021 14:08 #122804

  • Balliol Fowden
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Teamac BTV covers pretty well, and as I said I don't recall any compatibility problems so a barrier coat or primer should be unnecessary. Certainly we never used one. I would hesitate to use an aluminium primer since that will show through every scrape.

You may have problems with bleeding though if you put a conventional gloss paint directly over the Teamac, but I'm not sure why one might want to do that? Just don't splash it onto surfaces that are normally glossed. As a little tip, where a paint such as this abuts a normally gloss painted area we always used to cut in the last centimetre in black gloss.

Balliol.
The following user(s) said Thank You: Michael Miles

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Painting the hull to recover the shine. 29 Apr 2021 13:49 #122803

  • Michael Miles
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Thanks for your reply Balliol. to the black from right to left.
If you were to put this TEAMAC BTV onto a greyish hull, do you think that there would be enough cover to allow the TEAMAC to shine? Back in the 60's it was custom and practice to use aluminium primer on top of BTV to minimize bleeding. I noticed the difference in shine on the photo on this website, and the 4 barges at the front go from the grey to a more even black with at least a uniform co;our.

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Painting the hull to recover the shine. 28 Apr 2021 21:39 #122796

  • Balliol Fowden
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........ and it should perhaps be mentioned that frequently the “dullness” that Michael has noted can be because epoxy pitch has been used. EP or it’s latest pitch-free equivalents is wonderful below the waterline but UV light makes it chalk to a horrible greyish colour on topsides. For that reason we always used epoxy up to just above the water line, then Teamac BTV for the topsides down to the water line.

Balliol.

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Painting the hull to recover the shine. 28 Apr 2021 21:36 #122795

  • Balliol Fowden
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For many years I have used Teamac synthetic “Black Tar Varnish” over various old bituminous and tar like coatings, and I don’t ever recall having a compatibility problem. This product is moderately glossy when applied, and does dull with time, but nothing like as quickly as normal bituminous paints.

Balliol.

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Painting the hull to recover the shine. 28 Apr 2021 14:02 #122789

  • Michael Miles
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It is very noticeable in DBA group photos how the dullness has crept in over the years on the hulls. We used to be able to use glossy tars but now we are limited because of eco reasons. Once you have tar on any surface it becomes difficult to put anything else on top. I used to get away with overpainting on tar which was old and had lost the spirit, then use a black undercoat and put a cheap back gloss on top. and I am wondering whether anyone has been able to over-paint the dull matt tar coating with something else which has a shine.
Paint technology is changing continuouly, so I am hoping that there are options that have been tried and tested.

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