My opinion: Removing base is a shot in the foot... but done with a grenade launcher keep it as is [ or maybe reduce item manufacturing time a little ]
I actually agree with paints, But i will suggest better:
• RGB slider to make any color in the light spectrum and paint your items with it, for the price of 10,000 coins for each painted piece.
[ because it's just a simple color, why should i spend so much tokens on such a simple thing, i want my mechs white goddamit!!! ]
• Special paints valued by tokens, such as Giraffe, Camo etc keep the same as is.
[ they're special for a reason or another, make them a luxury item ]