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Painting your hull - 3/13/2008 6:15:49 PM   
evlwevl



Posts: 51
Joined: 8/22/2003
From: CA
Status: offline 		For those of you who have painted ABS hulls with duplicolor auto acrylic paint out of a can, did you use a primer first?, or did you just spray the color over the sanded plastic?

Im looking into painting my Seawind hull black or maybe that color shifting paint . I actually have a couple of boats to paint, including one that I originally used dupont auto paint from a spray gun. I just dont want the trouble and expense of going that route again for these projects.
       Post #: 1

RE: Painting your hull - 3/13/2008 6:51:59 PM   
sjmoreno77


 

Posts: 15
Joined: 6/8/2007
From: Minneola, FL, USA
Status: offline 		In the past I always used primer but have recently noticed that if I sand lightly (400 grit to 600 grit) I can just paint without the primer. I give it about 4 coats sanding between each with 600 grit sandpaper. Hope this helps.

(in reply to evlwevl)
       Post #: 2

RE: Painting your hull - 3/13/2008 7:14:34 PM   
evlwevl



Posts: 51
Joined: 8/22/2003
From: CA
Status: offline 		yeah that helps, im trying to avoid adding too much weight with primer especially if my base coat needs a clear topcoat.

(in reply to sjmoreno77)
       Post #: 3

RE: Painting your hull - 3/14/2008 5:51:22 AM   
hiljoball


 

Posts: 54
Joined: 3/11/2008
From: Parksville, BC, CANADA
Status: offline
quote:

ORIGINAL: evlwevl



Im looking into painting my Seawind hull black or maybe that color shifting paint .


Black may not be the best choice for a hull. It is very difficult to see a black hull on the water. Also the hull may get very hot sitting in the sun (depends upon where you sail).

Lighter colours are much easier to see. There is some theory about hull colours and racing mark colours. . .if you intend to race.

Warm colours like reds and oranges look closer than they really are. Cool colours like white, blues or greens look further away. So for example, if you sail an orange hull, you may turn short of a white or green mark. And it it is easy to sail a white hull well past an orange mark.

A white fin and rudder make it easier for you to see if you have picked up any weeds.


_____________________________

John - IOM CAN 229
Summer Vancouver Island, BC: winter, Yuma, AZ

(in reply to evlwevl)
       Post #: 4

RE: Painting your hull - 3/17/2008 1:38:06 AM   
evlwevl



Posts: 51
Joined: 8/22/2003
From: CA
Status: offline 		Well heres what I ended up doing The hull sides and bottom were painted black with a krylon paint specially for plastic. Unfortunately, There is no racing class for my seawind in this area. I originally bought some duplicolor mirage paint, which shifts from blue to red but decided not to use it because I saw a paint scheme for a real Americas cup boat and it was just black with a white deck. Ive left the keel and rudder white for the very reason of weed visibility. Now the next thing I want are a set of scale racing decals.

(in reply to hiljoball)
       Post #: 5

RE: Painting your hull - 6/21/2008 3:06:20 PM   
rva1945



Posts: 145
Joined: 11/8/2005
From: Buenos Aires, ARGENTINA
Status: offline 		Hi evlwevl:

This is my humble fleet:

www.geocities.com/navalrc

and there is another one in the painting process, a plastic cabin, fiberglass hull lifeboat.

Most of the times I didn't use a primer prior to paint on ABS, I just sanded it with 400 then 600 grit sandpaper, clean it with isopropilic alcohol, dry it and then airbrushed it with aprox. 50/50 thinned enamel paints, 3 or 4 coats as neeeded. The final coat was a clear gloss or varnish, in order to protect the paint and decals. The ABS cabin and deck of the mentioned lifeboat were sanded and then painted with Revell enamels with no problems at all.


But the fact is that if you prepare the plastic surface accordingly, i.e. sanding, and if you use a thinner or toluene (very small ratio of toluene) bases paints, they will stick to plastic well enough. Any way, sometimes it's necessary to use a good primer, and sanding the primer coat before applying color paint is a must. It's all abot experience.

Regards
Robert

(in reply to evlwevl)
       Post #: 6

RE: Painting your hull - 6/21/2008 5:50:23 PM   
misshydro



Posts: 1965
Joined: 8/1/2006
From: stmarys, OH, USA
Status: offline 		On plastic you do need to prime it because certian paints will attack plastics,plus it will give a good barior for paint bleed threws. sand that hull with 400,then prime it then sand it with 600 then paint it. I'd used dupi-colors on this hydro and used Nason spray clear on it to lock the decials down then used autoclear on it because its a nitro boat and autoclears can take the stuff. You can Use the dupi-color SUV clear on it since its not gas or nitro power or better yet use the Nason that duponts buget line. Its in a spraycan works great!! love the stuff.

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       Post #: 7

RE: Painting your hull - 6/30/2008 11:15:52 PM   
WHartje


 

Posts: 1
Joined: 8/7/2006
From: Phoenix, AZ, USA
Status: offline 		I have had good success with Krylon Fusion paints directly on to sanded ABS on both Fairwinds and a Seawind. The "Fusion" line is specifically formulated for application to plastic.

Careful application, followed by sanding with 400, 800, 1200 and 1600 gives a good result.

I then use Novus Plastic Polish #2 (Fine Scratch Cleaner) to polish the the paint to a mirror like finish.

(in reply to evlwevl)
       Post #: 8

RE: Painting your hull - 7/1/2008 2:30:13 AM   
GRANT ED



Posts: 2498
Joined: 4/13/2003
From: Adelaide, AUSTRALIA
Status: offline 		On my seawind I just sprayed a plastic paint straight onto the sanded hull. Worked great.

_____________________________

He who dies with the most toys wins.

(in reply to WHartje)
       Post #: 9

RE: Painting your hull - 8/8/2008 5:05:56 AM   
evlwevl



Posts: 51
Joined: 8/22/2003
From: CA
Status: offline 		Heres what I ended up doing, I think it turned out great. After I painted it, I covered it with a box lid to keep the dust from landing on the paint. I had some more black, so I also repainted my Nitro Vee as well. Thanks for the advice.

I've been trying these different brands of rattle can paint, and some have been successful and some feel like they never fully dry. I didnt want to ruin this hull or have to sand and respray again

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RE: Painting your hull - 8/8/2008 5:39:09 PM   
jetpack



Posts: 1503
Joined: 10/2/2002
From: Portage, IN, USA
Status: offline 		I read the thread, and when evlwevl mentioned using a box as a dust cover there's something that I've learned building and painting plastic models where we use mostly soft enamels.

The best way to get a super gloss or even save a bad paint job if pebbled, is right after you finish spraying, close it in an airtight box to keep the paint from gassing out too fast. This lets the solvents in the paint hang around longer and smooths out any kind of orange peel finish thats in the paint by allowing it to soften and wet over again, even skin dry finishes.

This works very well, so much that it is a good idea to baby sit it for runs. If this starts to happen, let it air out or turn the surface.

Remove it from the box after you know it has smoothed out and skinned over well enough for dust to not be a problem. If you leave it airtight until it dries there's a risk of hurting the gloss by the trapped gasses. It will cloud. Use the lid no more than necessary.

A big upside-down plastic storage tub would be perfect for painting your sailboats. Use the lid as the base, and cap it with the tub part.

< Message edited by jetpack -- 8/8/2008 5:47:45 PM >

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       Post #: 11

RE: Painting your hull - 8/8/2008 6:02:59 PM   
rva1945



Posts: 145
Joined: 11/8/2005
From: Buenos Aires, ARGENTINA
Status: offline 		As for protecting a recently finished paiting job, until de paint dries, I put the hull in a cardboard box, one that was a TV set package. I added a (PC) electric fan, with a filtered opening at the other side.

I let the fan run on just 6 volts in order to hav a smooth ventilation. This way the paint is protected against dust or whatever hovers in the air and let the solvent gasses escape.



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