For stripping acrylic, the alcohols you mention work well. Ethanol at 76% percent is also 24% water, and probably tap water at that. I recommend you avoid that. As for the fuel mixture, as long as those are the only components, it should be safe for the airbrush, but don’t let any of it sit in the airbrush between uses. Make sure it all gets blown out.
There is another consideration: methanol is poisonous, more so than isopropanol. If you are using these for cleaning or stripping, make sure you have adequate ventilation, i.e., a spray booth vented to the outside. A filter type booth is not adequate for those solvents.
Because I use Vallejo almost exclusively, I can’t speak to solvent compatibility with other paints other than Tamiya. Tamiya is compatible with isopropanol, but concentrated ethanol and methanol tend to cause it to gum up, though they can be used for stripping.
I’ve found it is economical to use Vallejo thinner and airbrush cleaner with Vallejo paints. One can use distilled water with a surfactant cleaner like Formula 409 to clean them, but at least with my Grex and T&C airbrushes, it takes surprisingly little of the Vallejo cleaner.
Do you have some old, empty paint bottles? You can use them to determine paint/solvent compatibility: Fill one half full with the solvent in question. Add paint drop-wise and observe its behavior. If a drop of paint instantly spreads out, mixing with the solvent, the solvent can at least be used to clean the airbrush or strip the paint. If the paint droplet stays together, try to stir it in. If it readily dissolves, the same result applies, at least marginally. If it turns into a globby mess, don’t use it with that paint for anything. For the ones that look promising, add more paint, at least a quarter of the solvent volume.In all cases except the globs, let the mixture stand at least overnight (several days is better). Then see stir it up, let it settle out again, and finally drain the excess solvent and let the paint dry, or apply the paint to a clean piece of scrap styrene. Once dry, check the adhesion. Fair adhesion or better means the solvent works well with that paint.