MTN Water Based 300 Spray Paint - RV3020 - Naphthol Red is a low pressure 300ml water based spray paint with matte finish that is perfect for indoor or outdoor use. This spray paint comes in a wide variety of colors and can be mixed with acrylics while wet, yet permanent once dry. Montana Colors MTN Water Based Spray Paint RV3020 - Naphthol Red color is a full medium slightly desaturated pinkish red hue.