qm00

It depends on what kiind of surface u want to paint lor.
Metal surface, use 變色龍/長頸鹿 ok ka. If u want to use Mr. Colour, u have to spray the special primer first.

For me, I use Mr. Colour coz they have a lot of choices in OD green but u have to spray the protective paint of semi-gloss or matt paint to make it durable.