Thanks for checking in! Excellent comments as always from this group! Robert... great tips about de-tacking the tape. Kirby... lack of primer on the lifted spots... probably related! About Montex canopy masks... I don't like them as much as I do the Eduard masks. I haven't had any fit issues with them though.
My main issue is the mask material. They are vinyl and a little bit on the stiff side. They don't grip that well on curved surfaces and I've had corners lift on me before and during painting.
So here is a post dedicated to clean up of markings. With any type of masks, some error is bound to occur. The errors I found were very minor and caused by user operator as opposed to anything faulty with the masks themselves. However, once I noticed them in the digital pictures, I couldn't ignore and set out to correcting them this afternoon.
The main issue is the trace of black along the bottom edges of the fuselage crosses where they should be white. But upon closer inspection, I found a couple of other imperfections that I thought were worth fixing. The right arm of the cross has slight curvature downward caused by the inadvertent bending of the mask. The other is the top border of white on the number "1", it is a little thinner than the rest of the border. I am going to fix all of these.
First, I mask the entire white portion of the cross that I want to correct. Careful attention is put upon placing that bottom edge of masking to expose the black line I want to eradicate. In order to avoid any "bright" spots of paint, I do the entire white portion and not just a piece of it. Thankfully the area is small and easily masked. The tape is de-tacked by purposefully handling the adhesive side with my fingers.
I want the repair to match the other areas of the cross so I can't just spray white or it will come out too bright. So I spray some neutral gray as a pre-shade filter. This also serves to eradicate the hard contrast between the black and the white, which would be hard to cover otherwise with white.
The white is applied, making sure that I spray into that bottom edge. Highly-thinned paints sprayed at low pressure is the key to these small repairs. You can see from the test sprays on the tape how small the spray pattern is. I was using a 5:1thinner to paint ration here.
Here is the cross after repairs. As you can see, I've also straightened out the curve on the right cross arm.
The top of the "1" is next. This is a VERY small area so placement of the masking is 99% of the work. I use a pair of magnifying loupes for this type of work, even when spraying.
The port side is all finished and no lifted paint, thankfully! Please note, the latches of the large fuselage hatch have been painted red per the description in Crandall's Dora book about Black 1.
Similar type of repair is called for on the starboard side. There is also a slight paint leak on upper portion of the cross that can be corrected.
I use the same pieces of tape for this side.
Black being an absolute color, the masking of the repair to the black area is much simpler. I just have to define a corrected edge with the tape and I can simply spray the black onto the repair area.
Here are the results of the starboard side repair. The circular port in the cross was painted red instead of using a decal.
This type of repair is only possible with the use of an airbrush. And it is MUCH easier to do these types of repairs with a gravity-feed brush. So if anyone is in the market for an airbrush, please consider a double-action airbrush with a small gravity-fed cup like this Iwata HP CS Plus. I can't imagine the amount of cleaning I'd have to do between each color change if the brush was siphon fed.