Some parts in my RX-78 need to be painted in a two tone colors. They are the bazooka and knee parts. In order to pull it off, some more masking are needed. Here are the before and after pictures of those parts:
I put on the masking tape after I finish painting half of the parts in flat white color. Wait for the white until its fully dried, and then cover the section which I want to stay white using Tamiya Masking Tape. After that I spray it using Tamiya Acrylic Purple:
Same step by step as the knee, but in here, after masking, I’m gonna paint the part using Tamiya Light Grey
There are only three parts that need to be done this way. Other parts could be painted individually and assembled after it was all painted in each of their color. Example, the shield :
anyway, here’s a little tips in painting parts with masking tape. I’ve made a simple illustration, and I really hope it is understandable😀
Red: Masking Tape
Blue arrow: spray direction
The regular problems in masking parts are peeled of paints when removing the tapes. This could be easily countered by priming, using a good quality masking tape for model kits, wait until paints are fully dried before masking, and removing the masking tape carefully when you’re done.
And the other problem is leaking in the tapes. You could reduce the risk of leakage by applying the masking tape in a good way, make sure that there are no air gaps in the masking tape. It is essential to make sure that border between colors are fully closed or masked without gaps. just press the masking tape firmly to ensure this. And then, spray the paint like the direction in my illustration. That way, the air will help the masking tape closed down, even if you accidentally have some gaps in the masking tape.
If you spray it like the illustration above, the air could lift the masking tape up, or, the paint could slip through between the masking tape and the surface even if the masking tape are not lifted up by the wind. If you have no option but to paint it in this direction, It is important that you don’t spray too close to the parts, too much wind blows could become a disaster😀
I learn about this from a scale modeling magazine (which I forgot the name). I still did some error in masking..there are still some leakage..but the amount are significantly less then my previous masking job😀