If my math is right, that ratio would work out to 19 drops of color A with 1 drop of color B (95/5 = 19/1). Measure it with a disposable pipette or an eye dropper, then thin as necessary for airbrushing.
I always mix mine by eye, usually adding so many drops of one colour and then so many oif anotehr. For the 5% i would just add a small amount and see how it looks. I don’t think you need to be to exact, especially with these WW1 aircraft.
Not sure what you mean about painting on the decals.
How would I approach it? I’d toss them out. There are dozens of decal companies that do lozenge camouflage decals in a number of scales, so they aren’t hard to find. Some sets come complete with ribbing tape, others don’t, so shop wisely.
But, if you need to go this route, spray a clear gloss coat first. Once cured, apply the decals as usual and apply another coat of clear to seal the decals. Then, paint over the top with a fine brush. At this point, you are not painting on a decal, but rather on the surface of the gloss seal coat. Once done painting, seal your work again, but with a dull coat. Reapply in light coats to get to yout desired sheen of finish.
That’s a lot of hassle for 1/72. Lend some thought to replacing them.
You should be able to find similar on a site in the US.
Photobucket will only work if you pay a $400 ransom. We have all swicthed to other sites, i am useing Flickr, but others are useing postimage, imageshack or a selction of otehr sites.
That‘s one of my biggest and annoying pet peeves with Revell’s paint call outs using percentage for mixing colors. I never bother with the bs paint ratio. Instead, I’ll do my research of color call outs elsewhere of the same subject. You’d be surprised for example, let’s say a paint ratio is x color 90% and y color is 10% is actually FS34079 Dark Green.
Don’t waste your time trying to deal with paint ratio for mixing colors. Do a little research instead and you’ll find the correct color found in a single bottle of Model Master or whatever brand paint it is.