Bottom Painting - Looking for Pointers

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Author	Topic: Bottom Painting - Looking for Pointers
whk Administrator	posted 03-07-2007 07:17 AM We're doing a total redo on Rhapsody's bottom this spring. There are too many layers of West Marine epoxy bottom paint to count that forms a nice "shelf" when you run your hand down the waterline. Fortunately, there are no signs of blisters. The plan is to strip to the gel coat using Peel Away Marine Stripper, Sand with 80 Grit and use Interlux Fiberwash 202, then apply a total 6 coats alternating Gray & White Interlux 2000E barrier coat. Once it cures, we'll apply 3 or 4 coats VC17 Offshore, light sand & burnish. Now the questions: 1. Anyone used Peel Away before and have pointers for use? I figure we'll need about 10 gallons. Reading web postings this stuff looks pretty good when used above 60 degrees (I'm looking at my thermometer and its 8 degrees outside now!) 2. Spraying Interlux 2000E - I've got a Wagner airless sprayer and planned on using this to get a smooth barrier coat base. Has anybody sprayed this stuff before and have recommended thinning ratios for an airless sprayer? Looks like the "Thumb print test" Interlux recommends for recoating means I get this done in one day for all the layers, or must wait 2 weeks between coats. 3. How much time should elapse before spraying the 1st coat of VC17 Offshore so the barrier coat cure / vapors don't impact the VC17 Offshore? 4. VC17 Offshore recoating - can these be done consecutively when each layer is dry to the touch? It looks like this stuff will dry quickly. Again - anyone use an airless sprayer with this and have pointers? Bill - Rhapsody #348 IP: 68.0.225.56
B Johansson Senior Member	posted 03-07-2007 08:28 AM I used regular Home Depot Peel Away (2 big pails)to remove 10+ layers of paint on Fuzzy Wuzzy with very good result. For best result work on relatively small areas - I did each side in 3 sections and then the keel as one section all in about a weeks time. For clean up use plenty of water and green Scotch Pads. Bengt - #452 "Fuzzy Wuzzy" IP: 138.89.11.72
john h unregistered	posted 03-07-2007 11:49 AM Bill I am planning on going through the same process on Madcap (old Thor 358). I talked to the Interlux guy and he advised me to roll the Interprotect 2000E. He said I could save 1-2 gallons for 5-6 coats. Then I am planning on spraying the VC-17 2-3 coats. As far as for Spraying VC-17, make sure good clean tip or it splatters. Recommended thinning is 10% on VC, but I have cut it up to 30% and have not noticed a difference. Answers to the rest of your questions would be helpful to me as well. John Madcap 358 IP: 205.188.116.130
whk Administrator	posted 03-07-2007 12:15 PM John, Did the Interlux guy recommend brush tip after roll? I see recommendations elsewhere for the no-nap foam rollers. I've never used one of them and haven't checked these out yet, so need to look into it. Bill IP: 199.46.198.233
john h unregistered	posted 03-07-2007 01:08 PM Bill: He didnt say. Brush tip would not be a bad idea, at lest be ready for. Need to do some more reserch on this. I will let you know if I find out anything. John IP: 205.188.116.130
john h unregistered	posted 03-07-2007 01:33 PM Bill I found this bulletin. Answers many of our questions. Notice the fine print on page 6. http://www.yachtpaint.com/Images/15_6819.pdf John IP: 205.188.116.130
dbows Senior Member	posted 03-07-2007 06:55 PM I have done the peel away twice and the barrier coat. The Peel-Away is tricky and it is very dependent on the temp of the hull and thinkness of the old paint. What I found happened with the many layers of old paint was that it would eat through the first few layers and then the paper would separate from the next layers causing me to do another coat. Get the big 5 gallon buckets at HD. I think I went through 4 the first year. As for the barrier coat. Just roll on and then you can sand down if needed. The stuff is soooo thick I would go for a small nap roller and be done with it and then sand it down smooth. The stuff is really soft and sands easily. As for bottom paint I would check out E-Paint Z0 www.epaint.com . It is a zinc based paint that works amazing. I put it on and never have to have the bottom cleaned. Yes I swear. I have someone go down mid season just to check and he has yet to charge me because the bottom is so clean. The company is right down on the Cape so you could probably drive and pick it up and save some shipping charges. DB #397 IP: 66.30.35.134
whk Administrator	posted 03-07-2007 08:56 PM quote: Originally posted by john h: Bill I found this bulletin. Answers many of our questions. Notice the fine print on page 6. http://www.yachtpaint.com/Images/15_6819.pdf John Great reference John! For those not wanting to read through the entire document... "Do not use the �Thumb Print� test when applying VC� Offshore, Baltoplate� or any vinyl antifouling over Interprotect. Allow the Interprotect to cure overnight and then sand with 80-grit sandpaper." IP: 68.0.225.56
whk Administrator	posted 03-07-2007 09:01 PM quote: Originally posted by dbows: .....Get the big 5 gallon buckets at HD. I think I went through 4 the first year. David - does the stuff you bought at Home Depot also remove existing barrier coat? I know there are two versions of the Marine grade, one that does, and the other that doesn't. I read somewhere that the non-marine grade stuff also softened the gelcoat. Did you have any problems like that? IP: 68.0.225.56
Ed Austin Senior Member	posted 03-08-2007 01:27 PM I'm not sure if you are talking about VC17 or VC Offshore, but I sprayed VC Offshore on my J30 for about 5 years. I bought a 1 gallon can and the appropriate thinner. I would then walk around the boat spraying a thin coat. This would usually get me around the boat two times and then I would use up almost all of the rest for another run at the waterline, keel and rudder without stopping in between coats. The little bit left over I would use for touching up where the jackstands and keel blocking were. IP: 216.138.160.163
dbows Senior Member	posted 03-09-2007 01:46 PM I had no problems with the gel coat. It was amazing, the boat was perfect, absolute mirror finish gelcoat - just like it came out of the factory. There is one that will not take off the barrier coat. I will get the numbers for you. David IP: 66.30.35.134
whk Administrator	posted 03-16-2007 04:51 PM Based on info that David Bows and a friend of his provided, Peel Away 7 is roughly equivalent to the Peel Away Marine Safety Strip (compare the Material Safety Data Sheets). I tried dealing with the local Home Depot and they did not have the 5 gallon buckets, only 1 gallon @ $63.97/gal. They offered to discount it by 10%. I looked on the web and located: Castle Wholesalers, Inc. 3450 Bladensburg Road Brentwood, MD 20722 http://www.castlewholesalers.com They sell it at $44.86/gal plus shipping. 6 gallons shipped from them was $60 less expensive than Home Depot when tax was added. So I'm looking out the window at the sleet coming down and have ordered 6 gallons on line. Hopefully when this arrives, the weather will cooperate and allow me to strip the bottom! IP: 68.0.225.56
the redhead unregistered	posted 03-17-2007 06:10 AM None of this was available when I stripped J.Doe...I used a case of easyoff oven cleaner... worked great. And I used a red varnish nap roller for the epoxy coatings... These unscientific processes are necessary when working in the third world, fourth dimension... IP: 66.185.42.241
Stefan Jans unregistered	posted 03-18-2007 08:54 PM wondering what kind of spraygun you are using. I always rolled the baltoplate, but it takes so much time to get it smooth. Hopefully spraying will save me some time when sanding. btw. I don't have a aircompressor... IP: 67.86.138.196
Ed Austin Senior Member	posted 03-21-2007 11:01 PM Stefan, I have used an airless spray gun to spray VC Offshore. Its supposed to be pretty similar to Baltoplate. Just needed to thin it out some, then wetsand with 200-600 grit. Ed IP: 12.227.217.5
Stefan Jans unregistered	posted 03-25-2007 10:45 PM Hey Ed, Could you tell me which kind of airless spray gun you are using. I am looking at the Wagner for $80 but the review I read wan't that good.... thanks, /Stefan IP: 67.86.138.196
S. Buzbee unregistered	posted 03-25-2007 11:18 PM So Ed- You are still reading and writing (and very helpful I might add)...any chance we'd see you back in a new "Chinook" ever? Steve IP: 67.85.188.66
Ed Austin Senior Member	posted 03-26-2007 10:03 AM I used a Wagner airless sprayer. It ran about $350. This differs from the cheap models in that it has a separate pump and spray gun with about 30' of hose between. It works well with properly thinned VC. Steve, there will be another 'Chinook' one day, but not in the immediate future. For now I will continue to frostbite my JY-15 and race on other people's boats. [This message has been edited by Ed Austin (edited 03-26-2007).] IP: 216.138.160.163
rdpierce Senior Member	posted 04-02-2007 05:09 PM quote: Originally posted by whk: Did the Interlux guy recommend brush tip after roll? I see recommendations elsewhere for the no-nap foam rollers. I've never used one of them and haven't checked these out yet, so need to look into it. My yard recommended using the West System yellow foam rollers normally used for epoxy. I've had nothing but good luck with them. Ryan Pierce Tesara, #337 IP: 63.215.121.10
S. Buzbee unregistered	posted 04-03-2007 10:49 AM Is it necessary to sand/rough up the finish between first and second coats of VC Offshore or Baltoplate? IP: 67.85.188.66
Ed Austin Senior Member	posted 04-04-2007 10:44 AM Steve, Are you planning on putting on more than a gallon of paint? I put on 1 gallon per year. A light sand to the old bottom paint, hose down with water, dry, wipe down with thinner, dry. Thin paint appropriately. Then, spray whole bottom starting at bow and go around whole boat including keel and rudder. Immediately, go around the whole boat again. Then, a third shot at the keel, rudder and waterline. Should leave a little bit left in the can for where the jackstands and keel blocking were so they can be touched up by hand (or use a Preval sprayer) when the boat is in the slings. A little wetsanding (entice crew to help with beer) and you are all set. No need to sand between coats. IP: 216.138.160.163
whk Administrator	posted 04-29-2007 10:17 PM Since I received many good pointers from people on this forum, I thought I'd document what I ended up with. This bottom redo was a very time consuming task that I won't be doing again! Here's a link to a web page with the results of the job. http://mysite.verizon.net/knellew/yanmar2gmrebuild/id12.html Thanks for the pointers from everyone! Bill - Rhapsody #348 IP: 68.229.95.28

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