Moderated Discussion Areas
  ContinuousWave: Whaler Repairs/Mods
  Bottom paint,,replacement

Post New Topic  Post Reply
search | FAQ | profile | register | author help

Author Topic:   Bottom paint,,replacement
jameso posted 10-11-2001 09:41 AM ET (US)   Profile for jameso   Send Email to jameso  
My 15 has had the bottom painted at least twice, it appears that one coat is real bottom paint the other is ??? I am in the process of doing some sanding and wiping with acetone in prep for a new coat of paint.
My question is this; since the boat will not be left the water for extended periods of time would it be best to give it a coat of Interlux two part or other type paint? No I am not going to scrape, sand, and chemical treat all the paint off!
Thanks Jim Armstrong
andygere posted 10-11-2001 02:54 PM ET (US)     Profile for andygere  Send Email to andygere     
It may be primer beneath the bottom paint. I just did my Montauk using Interlux Micron Extra (copolymer ablative paint) on top of Bondcote 200 primer, which is silver in color. Using this system, the gelcoat is not sanded, and could in theory be restored to an unpainted condition. I chose the ablative paint because it is self polishing, meaning it releases biocide by slowly wearing away. When the primer shows through, it's time to repaint, with no prep other than cleaning and degreasing. Make sure you use the special degreasing solvent suggested by the paint mfr. instead of acetone. Acetone tends to just move the contaminants around and leave them on the surface. Use one rag to apply and another to remove and change them often. It will make or break the paint job.

Traditional hard antifouling paints leach biocide through an epoxy matrix, which builds up each time you repaint. Eventually, it has to be sanded and scraped before repainting. These paints lose their effectiveness quickly when left out of the water because of oxidation. Ablative paints can be hauled and relaunched without losing effectiveness.

Interlux has an excellent guide to paints that is available for free at West Marine and other dealers, and much of the content is duplicated on their web site:

This is the first bottom paint job I have done, and it turned out nicely. I took a lot of care marking the waterline and taping it off (using fine-line autobody striping tape, not paper masking tape), and the result was worth it. I finished the job by adding a red tape stripe 1/2 inch above the blue paint line. It looks sharp.

jimh posted 10-11-2001 08:04 PM ET (US)     Profile for jimh  Send Email to jimh     
If you have to have bottom paint, using the blue bottom paint with a thin red stripe above it is a very nice way to go. It seems to look especially nice on a Whaler and I have seen several examples of it that are very pleasing to look at.

If the boat is not going to be left in the water, why not just let the bottom paint go? You ought to be able to remove it from the transom and hull sides without too much work, then just let the hull bottom wear away.

That is what I plan to do with my bottom-painted Whaler, now strictly a trailer-sailor.


Post New Topic  Post Reply
Hop to:

Contact Us | RETURN to ContinuousWave Top Page

Powered by: Ultimate Bulletin Board, Freeware Version 2000
Purchase our Licensed Version- which adds many more features!
© Infopop Corporation (formerly Madrona Park, Inc.), 1998 - 2000.