Question how to reduce Opaque black



and whit what nitro,alcohol or just water cause it is water based paint?
friend of mine is baging me to do his car hood but I dont know sh..t
about paint how to make it fluid nice....
Depends on the paint brand. Could be water, reducer, urethane reducer, lacquer thinner. We need more info to be able to help.
No matter what brand it is,it is always best to use the reducer/thinner that brand recommends. Once you get comfortable with it then you can experiment with different reducing mediums...rule of thumb: for waterbased use mfg. reducer, water, windex, denatured alcohol.....for solvent based paints use mfg. reducer/thinner and I believe laquer thinner also can be used.