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As the title says, this is about painting not marking. It's time to paint the hull, at the moment I'm considering all black with a white waterline. I will be airbrushing. The hull is already filled and primed. The waterline is marked on the hull.

 

This seems a little like the chicken and egg thing. What to mask first? Was considering first spraying a wide white line over the waterline mark. Apply masking tape over that, redraw the line on the tape then trimming the tape with an Exacto to leave the actual 1/16" waterline covered. My biggest problem with this is trying to cut tape on the wood surface. I always leave gouges from the knife when I do that.

 

There's always painting the hull first, then the waterline but I don't know about white over black.

 

Surely, I am completely missing something easier?

Edited by mikiek

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Paint a stripe about an inch wide along the hull where the waterline goes, in white or whatever color your waterline is meant to be.. Then mark the line, and lay a strip of masking tape the size of waterline where it is supposed to run on top of the white paint. . Spray your hull color over the tape and peel off.  

Edited by overdale

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I would do as joe, little trick to do with the masking tape is to tear a thin strip from the main strip and mask the line as the thinner the tape the easier it is to make a line and any slight bends to the line can be easily done with a thinner strip. Then mask over the original masking line with a wider bit. Also, before applying the tape run the sticky side across your trousers, jeans ect as this removes any ailments on the sticky section and creates a tighter fit to the area being masked.

Edited by Telp

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OK - the light is starting to come on. I have some thin Tamiya masking tape - I think it is 1/8" wide. That's still wider than the waterline so would I cut the tape to width before putting it on the hull?

 

Note: I always paint over the edge of the mask with clear paint to seal it up before painting.

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The Tamils tape is great stuff, it should as such at that width be able to meander to the line if it isn't a perfect straight line. Another trick I used in the past was to lay the tape then with a very fine wet and dry paper, run the paper along the tape edge it flattens it perfectly. I use to paint military aircraft for a living and masking a 360 degree circle by hand for roundels was a great way to use masking tape as a tool.

 

Even though the hull is black I'd be tempted to white prime the hull, mark the waterline on the white primer, then mask inside those lines so you create the waterline part under the tape, slightly rub along the tape then spray the hull black, this is the tricky part, don't wait for the black to dry totally, leave a little tab at the end of the tape and take the tape off, do it in one delecate pull and this will prevent any bleeding drying on or under the tape pulling any black away. Let it dry then mask the black up and spray the White. Black over white will be perfect for seeing the coverage. Do gentle coats as well, 3 good thin coats just wet enough to cover would be ideal rather than 1 thick coat which will bleed. Acrylic is perfect and it drys pretty fast as well but I'd be tempted to give the black 48 hours before placing masking tape on it.

 

Just one other, give the white primer a little scuff with one of those gentle kitchen scouring pads, they do a nice job without marking the primer. Best of luck and it the tape needs cutting in half just lay it on a clean table and cut down the center so you have two good edges with one bit of tape, the Tanya stuff is very forgiving and re sticks perfectly.

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For future reference.

 

I have successfully used Chartpak tape 1/16 wide for water lines on past builds. You can get the tape in art or office supply stores as well as on-line in different colors and widths. You can also use automotive pin stripe tape available in most major auto parts stores.  

 

After applying the tape I covered it with clear matte acrylic poly to protect it and insure it would not peel off in the future.

 

Just to clarify, I did not paint a water line.  The tape becomes the waterline.

Edited by bogeygolpher

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I like the idea of not having to cut the tape. That was one of the more difficult steps in the effort.

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