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Post by skunkworks on Apr 13, 2007 21:16:43 GMT 1
I am considering painting my SC and I'm wondering what is the favorite paint. Some are using Krylon Fusion (for plastics?) and I've also seen Krylon H20 on the shelf. It's a spray latex. What is the best? What doesn't rub off or crack? Is a clear coat needed if not covered with tape?
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Post by gotballs on Apr 28, 2007 8:09:48 GMT 1
Skunk I have used that spray paint for plastics on my wing for the cub and it works good , it is just cracking where the dihedrial is working out. It does not work well with GWS foam.
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Don
Flying officer
Posts: 14
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Post by Don on Jul 19, 2009 17:18:24 GMT 1
I first used the Krylon H2O and did not use a clear coat. I noticed it flaked off fairly easily. This does not make a happy SC pilot!
Last week I repainted it using Tamiya X8 Lemon Yellow, sprayed with my Badger 150 airbrush. It came out great, the Lemon Yellow over the Krylon H20 Yellow Sea 2602 (evidently no longer carried at Michaels Arts & Craft chain) allowed me to tone the color to the shade I liked.
After 48 hours of cure time I sprayed on several LIGHT coats of MinWax Polycrylic to the desired sheen. I then let it cure for an additional 48 hours before applying the stock decals.
One note on decals, if you take a bit of water and a drop of dishwashing soap place this in a bowl, use a sponge to apply a bit of the solution on the surface of the plane it will allow you to position the decals where you want before they stick. Blot off the excess water with a cotton cloth, don't worry about any excess water being trapped between the decals and the surface. The water will eventually evaporate through the decals and they will adhere as intended.
Don
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belem
Squadron leader
Posts: 210
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Post by belem on Jul 19, 2009 21:09:43 GMT 1
I used Fusion and haven't had any flaking. It's rubbed off in a few places due to crashed and other misadventures but I'm pretty pleased with it.
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Post by admiralev on Jul 20, 2009 4:08:08 GMT 1
the problem with painting the cub is that the paint forms something similar to an eggshell which surrounds the foam which can flex. there really isnt any paint that wont flake when the foam is flexed underneath it. i tried painting twice and wished both times i wouldve just let it be. covering is a better, although not perfect solution to the problem as the foam flexing can still wrinkle the covering.
admiral
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Don
Flying officer
Posts: 14
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Post by Don on Jul 21, 2009 23:40:05 GMT 1
The trick is to gloss coat your paint job. This adds a protective layer to the color coat.
While it's true to a degree that the color coat can flake off it's due to the paint not being 'hot" enough to bite into the foam. If a paint is to hot it will melt the foam....all those pesky chemicals not getting along.
Lacquer, and most enamels are to hot to use on foam that's why you have to use an acrylic paint. Acrylics cure by evaporation instead of etching or bonding to the surface. The gloss urethane being somewhat flexible will aid in the paint staying put. Urethane from Minwax is water based and has some pretty good adhesion properties.
In short I am not sure if there is a perfect paint to use on foam but that's what the hobby is all about......experamenting and having fun!!
Don
PS: If you think trying to paint foam is fun try painting "milk bottle" plastic used on some cowling's and heli canopies. It's almost pure oil and nothing short of epoxy paint will stick to it!!
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