I wouldn't repaint it. I don't know where in Korea you are touring but it's better to have a bicycle that blend's in on a foreign tour. I know that first world people want to impress others on their social media with their blingy bike's in foreign places. But I've found that it's safer and people are more open and welcoming if you look like you belong. I've been to places where even having $200/US is more than most of the locals made in 6 months to a year. Just my two cents...

Edit; also 26" is probably the best tire size if you get off the beaten path a bit. 26'ers are only dead in first world countries.