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Old 03-10-2007
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Bottom Job

I recently purchased a Cal24. We are doing the bottom job ourself and are in the process of sanding 36 years worth of bottom paint off. I will use west marine's ablative type anti-foul paint. Can someone tell me if I have to use some type of primer before rolling on the new paint.
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Old 03-10-2007
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If your taking it all the way down to the gellcoat now is the time to put on a good barrier coat and that will act as the primer for the bottom paint.
You might want to consider a hard bottom paint for the first go round then go with an ablative. good time to fair the hull as well.
Just a thoght
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Old 03-10-2007
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Thanks!

Much Thanks for the tip. The biggest boat in the yard before we brought the Cal home is our Hobie16. All you do with it is clean, wax it, then throw it in the water and go sail fast.
Mc51
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Old 03-10-2007
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Exclamation Soda blasting...

I know your in the middle of sanding the bottom, and your probably finding it a very arduous job, especially if your going to take it all the way down to the gel coat. You may want to consider hiring someone to soda blast the bottom, it may be worth your back

This is a good time to look for blisters and repair them and fair the bottom, then apply a barrier coat before new bottom paint.

Its allot of work, but will add value (done properly), peace of mind, and a great sense of accomplishment when finished.

The soda blasting may not take "all" the bottom paint of, so you'll still have to sand a allot, will be much easier. Be sure your wearing the proper safety equiptment...breathing apparatus, eye wear, and overalls. You should also be using a sander with a vacuum attachment to be friendly to the environment and your neighbors.

Good luck
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Old 03-10-2007
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Are you leaving the boat in the water or trailering it?
If your trailering it they make anti fouls specificaly for that I wouldn't use a soft paint on a trailered boat. You probably wouldn,t even need the anti foul if your trailering the boat back and forth. but it will make it easier to clean up after a long weekend.
hope this helps
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Old 03-10-2007
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Bottom Paint

Quote:
Originally Posted by Mc51
I recently purchased a Cal24. We are doing the bottom job ourself and are in the process of sanding 36 years worth of bottom paint off. I will use west marine's ablative type anti-foul paint. Can someone tell me if I have to use some type of primer before rolling on the new paint.
Mc51
If the boat presently show no apparent blistering, I would not bother with putting on a barrier coat - no blisters, no need...unless you are dramatically changing how the boat is used, such as moving to the Caribbean for 12 months use a year, in which case it deserves some thought as a precaution.

Take a look at http://www.yachtpaint.com/usa/default.asp for excellent instructions on bottom prep, I doubt you want to use a hard paint as a primer. If you have any questions there's a free 800 number buried at the bottom of some pages. Also,if you check at West Marine, they can probably confirm the paint they sell is actually private-labled Interlux.
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Old 03-10-2007
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Quote:
Originally Posted by soul searcher
If your trailering it they make anti fouls specificaly for that I wouldn't use a soft paint on a trailered boat.
I disagree. One of the few advantages ablative paints have over epoxies is that they can withstand extended periods exposed to air, making them a good choice for trailerables. I am unaware of any anti fouling made specifically for use on trailerable boats.
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may have said that wrong, recomended for boats that are trailered or put on a lift.
try this it might helphttp://www.pettitpaint.com/perfect_pick.asp
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Old 03-10-2007
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Much Thanks! to all for the replies. We decided to use ablative paint because we are not sure if we will leve it in a slip. Since I built the trailer good enough to bring the boat back here to the Gulf from Ca. Taking it back and forth is one of the options, depending on hour hard it it to step the mast ourselves. I might leave it in April through December and them bring it to the house for a refit each year during the four coldest months. The Gel coat looks good, no blistering found so far, but it is 36 years old. I tried my on sand blaster but the sanding seems to be faster. Luckily we're at the end of a dead end street. I don't complain to my neighbor about how loud his Harley is so he can't complain about the sander's noise.
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I hope that you got your original question answered? If not, I would barrier coat anyway, acts as a primer and cant hurt if your thinking of keeping her in the water for even part of the year.

If you do this, it is imperative to remove all contaminates and bottom paint so that you get a good bond. Another tip would be to apply the first coat of bottom paint before your primer/barrier coat is cured, approx 3-4 hours after.
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