>>9753908i mix my own washes out of acrylic paint and water (plus drop or two of flow improver in the bottle), then apply it with a calligraphy dip pen.
>>9753943microblading cotton buds are great for cleaning it up when you need fine control. dip in the appropriate thinner for the type of paint you are using first. i just use water because i use acrylic washes, if you are using enamels like tamiya you will want naptha or something