As a professional body painter and one who hangs out with the world's top body artists --- Here are the top brands used by the top body painters internationally - all good, all have a learning curve some more than others. What one uses comes down to personal choice based on ease of use, environment - some makeup works different in humidity or dry climates, ease of availability, color selection or if they makeup company is giving it to you free! Most body painters use between 1-3 brands in their kits.
Kryolan (cakes & airbrush) - worldwide a top choice - cakes best colors but soft most easy to come off - airbrush new colors regularly, very durable.
Mehron's Paradise AQ (cakes) also now a worldwide product - complementing colors not as vibrant as some, meduim durabiltiy.
Wolfe Face Art and FX (cakes) body painter swear by their black and white as the #1 choice - vibrant colors - grater learning curve.
Mehron's new LUX - (airbrush) great colors, good durability.
In the UK
Fardel creams (Fradel in the US is not a pigmented and now hard to get)
There are other brands but these are the top - for airbrush many do use Graftobian based on the large colors selection.
Some use Temptu or Obsessive Compulsive Cosmetics, European Body Art but it is so expensive to use it is best for small applications not full body
For cakes Diamond FX (a Wolfe knock-off).
In the UK you'll find Grimas.
In both the UK and USA for creams Fantasy World Wide- easy to use lousy color selection.
Yes there are lots of other brands ( i.e. I see folks recommend Ben Nye all the time and it's great used by makeup artists just not body painters for the most part) many very good products that will work but there just don't happen to be what most of use use - we use these brands based on cost, color, durability and ease of availability.
For best durablity when we compete or set out artworks to stage we fix/seal our paint/makeup with Kryolan or Mehron Fixer.