I am getting back into mini painting after being away for 25 years.

I bought a Gundam and an Armada ship from Mantic the other day so I can sort of figure out what I like to paint now. Years ago I was all over Epic 40k, and BattleFleet Gothic.

I was looking at base coating, and noticed that the GW spray paints are 25$ a piece… which is flipping insane! Sadly it was all the store had.

What do you all recommend?