Over the last couple of days I've been adjusting the colors on the major repair area. While I was happy with my overall paint job I was not thrilled. And while I think that it suffices to the extent that no one who didn't see it damaged would ever think it had been damaged, my ideal goal (with any repair) is for me to not be able to tell where I repaired it. I'm sure if you are on this forum you too are your own worst critic and understand this.
On Wednesday I did some eraser testing using a Pentel Hi-Poly eraser. Seemed to work to gently dial back some of the dark green spray I had mistakenly used instead of black to reduce the area's luminosity. If you look closely there are some lighter silver areas in the middle around the two dark horizontal creases. Those were where I tested.
On Friday I cleared (using General) all the small repair areas, which need no further adjusting. Then I set about trying to get rid of the dark border clouds you can see in the pic above, and shift the hue more toward aqua, and adjust the luminosity too as my repair area was a little too dark. You can see here how the value is more evenly similar to the ADI paint now, but the hue shifted a bit brown, and some of it is still too dark.
Next I drybrushed the X-11 (apparently you can drybrush hybrid acrylics). Some of the drybrushing was over the darker colors but most of it was to lighten the space between splotches. This got me a lot closer to what I was after.
Then I cleared it and...crap. The darker colors darkened a lot more than the lighter colors and shifted everything again. But better to find out now than when I'm doing the final clear with a 2K.
So, back to drybrushing...this time focusing more on adjusting the overall value (standing far back to look at it) so the ranges lined up with the ranges of ADI's paint on either side. I will point out that adjusting the repair are would be MUCH easier if I just darkened ADI's paint to blend out my repair over a wider area. But since this portion of the project is restoration that seems counter to my purpose.
Cleared it again, much better but not there yet.
Actually I thought it looked decent enough to move on to painting the middle section next...until I turned off the lights and saw that the repair area is much darker under low light (one small motion sensor light still active) than the ADI paint. So now I was sure I was not done adjusting. This pic below is over-exposed but accurately shows how different the repair area looked under this light. I must assume that to some degree this is because the reflective values of Alumaluster and Tamiya's X-11 are different. But also that is just an assumption at this point because I do still have more color paint over my reflective surface than ADI did. I will find out more after adjusting the repair further.
Saturday, began with more significant drybrushing using a much larger makeup brush. The focus at this point was trying to get rid of the dark clouds on either side of the repair area and pulling the ADI lighter areas (low-to-high from the left, and low from the right) across my repair area to make it more integrated. Why not airbrush I hear you ask...because drybrushing gives me more precise control and there is zero overspray. So no risk (or changes) to the ADI paint to either side that I'm referencing/matching.
Then I shifted to focusing on color tone, using the aqua to tint select dark green and browner splotches to be more in keeping with ADI's arrangements. I drybrushed some of this through the masks I had made, to reduce the fuzzing of the splotch shapes. ADI's were fairly crisp and I didn't want to get everything else right but then betray the repair area via textural inconsistency.
Cleared it again, mostly to check for darkening. A little but the aqua doesn't darken as much as the dark green did. Also, at this point I began to wonder if there even WAS any dark green on ADI's blue side. In retrospect I think that they may have just used aqua and black and as the aqua darkened it simply looked more green to the eye. Too late to change on the repair area now, but maybe something to consider when I paint the middle. K.I.S.S.
So yes, you guessed it, more drybrushing! This time I was working to balance the lighter values that I now saw more clearly in ADI's shadow areas. If you look closely you will see that their shadows often have a lighter portion underneath. I expect this is there to imply reflected light and that (along with the reflective base) would add a lot of sculptural definition - especially on film.
Last touchups of the day. More adjusting of shadow areas and contrast between splotches. This was, I think (because I've never done it), a lot like putting on makeup. Step back to get a better sense of the whole, then jump forward to work on a spot that stuck out as wrong, back to distance, and on and on. Every time you see something that stands out, that's what needs to be adjusted. Until you get to the point where the standouts are relatively the same as the reference.
Which brings us to "good enough". As I have been told:"A painting is never finished, it's abandoned." Because there is always more you could do. Or similarly for machinists:"There is no perfect, it's a question of tolerance." What is acceptable deviation? I know I should let go of my goal of not being able to tell where my own repair is, that's a deep rabbit hole in the context of a candy paint. So my revised goal is that my repair look to be of similar deviation as the variety within ADI's original paint.
In the context of my revised goal the large repair is still not all the way there, but it's a lot better than it was on Wednesday.
Here is a quick before/after, since the changes are subtle in the sequence of pics above.
It's actually kind of nice that this project finally tried to be a pain in the ass. Things were going too smoothly up to this point, at least for a project that I expected to be quite difficult. Now I feel like the hardest "gotcha" event is behind me. Even though there is more fine tuning needed I at least feel like I now understand the variables and their relationships to each other.