Bosny Spray Paint Plastic Primer Bosny Plastic Primer Spray is special formula with best adhesion on plastic substrates such as auto bumpers, spoiler, rigid rubber parts, plastic appliances and various plastic parts. It acts as ashesion primer on most hard to adhere substrates including aluminium, leather, vinyls and most plastic, namely PP, ABS, PS, PE and ets. Can be top coated with acrylic or alkyd paints as desired.