Where's the top coat ... not spray. 1L, don't give up. Spray painting is generally corrosive and does great harm to lines.

In the market, there are two kinds of colored pens, YY and Victory. (I don't remember how many victories there seem to be), and it was "painted" on the board.

Printed signs ... how to say, personality is personality, but it will always fade. When you hit the ball, it's full of colors, and then other people's beats are infected. People have opinions.

I heard ... I heard YY has an original Japanese colored pen that won't fade. I haven't tried, I don't know.