Painting hull with ani-fouling

[Rob Roy Macgregor]

I know it is a bit early for this, but I guess I need to be prepared.
The anti-fouling on my hull is wearing thin and I need to re-coat in the spring. I plan on using Interlux Botomkote XXX as I am in a Northern climate.
For painting on the trailer, I plan to use a wooden cradle under the stern and tilting the trailer to expose the areas under the stern trailer cradles.
But, how do I do the area under the forward trailer cradle?

[Catigale]

Rob - I did a search on

Hull paint jack block

and clicked the 'search all terms buttons'

and found a pretty good thread here

Cheers ...

[Rob Roy Macgregor]

Lots of suggestions in that thread. I just need to sort out the most practical. Do you suggest using a power washer to remove most of the old coating before applying a new coating?

[Frank C]

Rob,

I think I'd be reading at the Interlux site for those details.

Do you really think a powerwasher would remove your paint?
Where would you be doing it?
Any enviro-rules in Canada about the run-off residue?
IF the powerwasher would work, if I did that either at marina or in my driveway, they'd throw me in jail!

There's a one-man auto-detail shop on the same street as my Marina, adjacent to the Estuary. He must use an inflatable catch-basin under the cars and trucks to catch and pre-filter his gray-water before it goes into teh storm drain. Ahhhh - life in CALiGREENia!!

[theroche]

I pulled my 99 out Monday for the first time since I bought it last year. Time to bottom paint and upgrade the kicker to a 90 hp. I ordered my paint on-line from Wholesale marine, Pettit Vivid black, $135 a gallon with free delivery. I ordered it Tuesday and it arrived today. That's what I call quick service.
Anyway I sprayed the hull down with "Slimy Grimy" after getting her back to the house. I don't know how long it had been since she was last hauled but the growth and slime did not just rinse off with the spray. It did seem to come off easily when I used my power washer. I took pictures before, during and after, which I will post when the job is done completely. I wish I would have done a test patch with and with out the Slimy Grimy.
Tomorrow I start sanding and prepping the bottom. If things go as planned I should start painting Dec 26th. More to follow...
Mike

[James V]

Becareful of the temps. Too cold and it might not do too well.

[Shane]

Becareful of the temps. Too cold and it might not do too well.

James,

I'll be tackling the bottom come springtime, so I'm following all related threads with interest. I'm hoping this warning is directed towards Rob Roy, because Mike (post above yours) is in Texas, and I see you are in Florida. Is there a general 'optimal' temp range for application, or are each brands significantly different? I was just kind of assuming once we get into a stretch of warm springtime days (10-12 degrees Celsius- 50ish Farenheit) that would be sufficient. I know I've still got to decide on what product to apply, and will be governed by that, but a ballpark low temp would be appreciated.

Regards,
Shane

[Jeff S]

Lots of suggestions in that thread. I just need to sort out the most practical. Do you suggest using a power washer to remove most of the old coating before applying a new coating?

The best way is to get a large drop cloth, tow the trailer and boat over the drop cloth. Put some weight on the sides to hold down the edges. Have a quality respirator, goggles, gloves and coveralls. Use a powered sander. Be careful not to sand too deeply- the barrier coat (if there is one) should remain intact, if there is no barrier coat you don't want to eat into the hull gelcoat. Even if a pressure wash could remove the paint it would take longer, be messier, run off all over the place and you would have little control over how deep it cut. Use masking tape at the edge of the paint line so that you don't sand or paint beyond the tape. Bottom paint is nasty stuff. Paint is nasty, bottom paint had biocides designed to kill things. When you are done, roll up the tarp and dispose of as you would any paint/chemical substance (varies by area).

As far as the type of paint it is important to determine exactly what type suits your needs. Also, if you know what type of bottom paint is currently on the boat you can determine what you have to do with the old paint. Some paints only require a light sanding so the new paint can adhere. Others need to be removed completely. I chose one that I could lightly sand and reapply to make future applications easier. Also you don't have to redo the barrier coat this way. West Marine has a good article HERE.

[theroche]

The instructions on the paint can (Pettit Vivid )said the temp should be between 50 and 90 degrees F. It aslo stated that you should paint between the hours of 9:00 am & 4:00 pm to avoid the possibility of dew or condensation spoiling the application.

This product is listed as a hardcoat antifouling bottom paint, espesially recommended for trailor sailboats. Would be great to hear from others who used this product.
mike