Hey all, first post. I read the forums often, (as is common, getting back into the hobby after 25 years, ha) and I noticed something here I can contribute.
Re: using decals on an instrument panel that has raised areas (very short cylinders basically) and a flat decal. When I faced this with my first build (which I am still working on), being a total noob, I decided to give it a go against all reason that the decals would work. Worst case, I knew I could just remove the decal.
It actually works if you use Micro Sol on the decal. The solvent properties of that chemical, after probably 5 applications, caused it to adhere to the uneven surface flawlessly. I actually did take some pictures showing this, but my slightly off center placement of the decal REALLY showed up so I think I deleted the images, so unfortunately I can't show you the result. The gauges were on the tops of the cylinders, and the rest of the decal settled down between them, no silvering.
This is a cheapo Revell p47, not sure if they are unusual quality (good or bad) or common. Might be worth a try to someone looking to get the benefit of the decal w/o buying aftermarket parts or too much extra effort.
I really like the tip about using a drop of Future on the decal faces to create a glass effect, that's brilliant!