so today i tried playing around with acrylic paint on some spare parts, and the result was...bad.
although i nv mix with thinner(I know this will make the paint more consistent), but i was wondering whether it could be the paint brush itself since the brush is kinda coarse and rough. my question is whether or not paint brushes have different types like maybe a softer brush or something? some advice needed here

noob question here, can i use normal thinner as opposed to hobby thinner when mixing with paint? are they the same?

Anyone got any idea where i can find rubbing alcohol, specifically isopropyl alcohol, or even lighter fluid?
need it for enamel paint.

I will heading to Home-DIY to checkout but as for the alcohol alone where should i look?