Brain, dunno know if I can answer this and make it come out the way I'd like you to understand it, but here it goes anyway,,,,,,,
as seen above in the photos of the 747,,, I'm bout 99% positive the original painter did NOT apply the Chrome Alpha texture to mess up a good paint.
someone else who thought it looked neat probably did it.
Now Granted, some Aircraft do need to have the Chrome effect, such as off the top of my noggin, the P-51 Mustangs sometimes look good with the Chrome effect on the Fuseladge or some WW-II bombers , fighter jets etc.
You can use the program (freeware) called DXT Bitmap,,, to apply Alpha channels and to remove Alpha channels or Chrome effects.
takes some playing around with it to get the hang of it tho.
Also, sometimes I have found just a Black Square that has an Alpha applied to it, which may or may not Chrome some parts, depending on how the Aircraft designer used the textures to apply to the aircraft , it just depends on each individual aircraft.
A Really super Good knowledgable experienced Re-Painter ( which I'm NOT) , will have the Ability and the paint program to be able to MASK off the areas that doesn't need to be Chromed, and only Chrome the areas that are NOT masked off, kinda like masking tape and actual spray painting,,,,
some areas of Aircraft just don't look good Chromed and were never meant to look chromed, but, get chromed anyway by the limited ability of say an Inexperienced repainter, and / or their limited ability with the Paint programs they have available to them to use, that and the understanding of how it works.
The Masking Technique is a master to master itself, takes time to learn it and get it right so it looks realistic on the Aircraft.
I myself am totally lousy at it for I truly haven't taken the time to master the Technique tho I have the Paint programs to do it, just never took the time to learn it , that and to be blunt - I'm kinda Lazy in that area !
The 747 above obviously had the chrome effect applied to it "without" any Masking, and ended up with Chrome on everything, where there shouldn't of been chrome , and it Distorted the image entirely and kinda ruined the actual nice colorful paint , I knew there was a nice paint job hiding under all that Distorted Chrome, so I got rid of it.
There is some repainting Techniques to be found on YOU TUBE, and adding that Chrome Alpha Technique, you'd just have to watch and learn and experiment to get the hang of it, practice, trial & error basically.
That's the best I can answer your Question.
Jetranger
