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Help with paint and tape.

Old 03-29-2014, 08:36 AM
  #1  
Doomking
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Default Help with paint and tape.

Need some help.
I glassed my model ,primed and painted it with rust oleum paint.
Now I want to add an additional color to the tail.
I am using 3m Blue masking tape, however when I pulled the masking tape off the model after spraying the new one, you can see a residue where the tape was and I am not sure if it is glue or paint coming off.
The base paint was a couple of days old.
Is there a tape that you can use to mask off that solves that problem? 3m Green tape perhaps?
Should I let the paint cure longer than a couple of days before applying next color?
All the help is appreciated.

Thanks

Fabio
Old 03-29-2014, 09:47 AM
  #2  
gene6029
 
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Fabio, i use Scotch green tape, #233 for all my edge lines. I use the blue only to attach my aluminum foil or paper to prevent overspray. I have several build threads where i show the results on RC Groups. The lines are very crisp and dont require touch up of any kind. I do however lay my tape down on bare balsa & pull it off to reduce the chance of pulling up previous paint. Heres a few pics of my last paint job i did this this past weekend. I pull my tape off within the first hour after spraying. I spray lacquer (dope) only. I get excellent results with this process.....Gene
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Old 03-29-2014, 11:38 AM
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Fabio, the first question I will ask is the primer Rustoleum primer. Using different brands of primer and paint can result in a poor bond of the paint to the primer. The poor bond will allow the paint to lift when you pull the masking tape. Most painters will tell you to pull the masking tape once the paint has cured to a tack free condition. I have always used automotive paint. It may cost more than the cheaper stuff but if you don't mix paint and primer brands you will always have a good finish. I also use 3M Fine line tape when I apply a color pattern over a base color. Fine Line is a flexible vinyl tape made for automotive masking. It's available in various widths. Once I mask with the Fine Line I mask the other areas to prevent over spray with regular 3M tan colored masking tape and brown paper from the hardware store. I found that using newspaper for masking can leave news print on your model.
Old 03-29-2014, 01:37 PM
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Fabio, I've never had that tape leave visible residue if pulled within a few days,, I'd say it's possible the base coat wasn't fully cured. cool winter conditions? might need to let it cure longer or in the house??
Old 03-30-2014, 03:37 AM
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Rustoleum needs to sit for around a week, before adding a second color.

Automotive primers, such as Duplicolor work well under Rustoleum, but the paint, itself take "forever" to dry.

My guess is that the paint felt dry to the touch, but was not completely set up.

I am in full agreement with using the 3M fine line tape. It provides crisp lines when masking, and the 1/8" goes around corners well. I use similar masking procedures as Square Nozzle. Gene's results look great, using the Scotch green, but I have not been able to achieve the same results.

I pull my tape as soon as the paint starts to set, usually within a couple hours of spraying.

Rustoleum is a viable coating for our models. It cannot be rushed, however. It needs to be thoroughly set up before masking additional colors.

The models below, are all painted with Rustoleum.
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Old 03-30-2014, 07:09 AM
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DavidAgar
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The blue and the green tape will leave behind a residue. You can get it off by taking some blue tape and putting it on the residue, sticky side down and it will pull it off. Good Luck, Dave
Old 03-30-2014, 08:41 AM
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3m Blue masking tape comes in a variety of adhesions. The orange cardboard roll is the lowest. If it's still to sticky, I will stick it to my pant leg a few times. I've painted solartex with enamals and foam with latex, never had a problem.
Old 03-30-2014, 02:58 PM
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I got this result, today, with the 3M fine line tape.
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Old 03-31-2014, 01:47 AM
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Nice work Tom, especially like the jewleing.(sp)?......Gene
Old 03-31-2014, 02:21 AM
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Originally Posted by gene6029 View Post
Nice work Tom, especially like the jewleing.(sp)?......Gene
Thanks, Gene !

I watched a couple You Tube vids to learn the engine turning process. After that, it was just a matter of developing a technique that was suitable for project.

I'm going to buy some of the green painter's tape, and shoot some test pieces. I haven't been able to achieve the crisp lines that you do.

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