Just use the sandpaper until you put the smooth surface rough, then apply a coat of white for lighr color or a coat of black for dark ones, the coat will be used to level and make the surface plain. Hope it works
Then i dont know if it’s the photo but it look that it need more water, as far i know most acrylic paints use -1 water for each +X paint (ex: 3 of blue 2 of water) also you can use sand paper on the surface before panting for paint to grab better.
Just use the sandpaper until you put the smooth surface rough, then apply a coat of white for lighr color or a coat of black for dark ones, the coat will be used to level and make the surface plain. Hope it works
question, that paint job is with markers? if the answe is yes, it´s better to use acrilic paints, and a 000 paintbrush or 00 (yes that is it´s name doble 0 like the gundam)
Then i dont know if it’s the photo but it look that it need more water, as far i know most acrylic paints use -1 water for each +X paint (ex: 3 of blue 2 of water) also you can use sand paper on the surface before panting for paint to grab better.
Just use the sandpaper until you put the smooth surface rough, then apply a coat of white for lighr color or a coat of black for dark ones, the coat will be used to level and make the surface plain. Hope it works