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My estimation would be, if you are priming EVERYTHING with 1 layer of primer, then you could probably get 1-3 complicated MG's out of it, 1-4 simple MG's out of it, and 4-ish HG's. But bear in mind this is an estimation. The reason why is that you can pre-thin this primer (pour jar contents into a DSPIAE paint dropper bottle, fill jar with Mr. Levelling 1 and 1/2 times) use it with the same airbrush needle/nozzle and PSI each time, and have a relatively big dropper bottle of primer ready to go. I would think that since Bandai kits are so well made, most don't usually have surfacer imperfections like car model kits, you'd be doing 1 layer of primer on your kits and then be ready for your base color in no time. Even though the bottle is tiny, it's a lacquer paint, and you can really thin these MR Color paints out. Most people agree with a almost 60 thinner 40 paint for Mr Color, or 1 jar of mr color with 1 1/2 mr color jars amount of Mr Levlling into a paint bottle. Hope this helps, again, just an amatuer estimation.

For surfacers, the greater the number, the more fine the paint particles are, so this will be easier to apply on pieces that have smaller gaps/panel lines. These are not pre-thinned, so you will have to thin it before using it in an airbrush.

This is a 40ml jar.