painting DOHC

Guys, the side mods on the front left and right sides have DOHC printed on the inside. U guys have that no? Well, the color is worn out and i’m replacing them with Racing Blue same color I did my brakes with … How CAN I DO THAT? anybody has any ideas? All I have at home a the blue color spray bottel. Can anyone tell me how I’ll go about spraying the words inside the groove on the modling?

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