A lot of these kits require sanding to be honest. Which is fair since you can’t really control if the wood swells etc. as opposed to plastic so don’t be too stressed. 
I don’t really see any painting marks you’re referring to lol! 
Are you looking with a magnifying glass again! 
You can try a little touch up with an acrylic marker but I would test a scrap if possible. Sometimes the walls are separate and sometimes they come on a board and you punch them out. If that is the type, you may be able to use the board to match the color. Otherwise it may be in an area you wont even notice ot see!
Manifesting for you makuha mo rin s’ya. Blind box ba ‘yung bibilhin mo? O ‘yung sure naaa?
Thank you and it’s okay. 
Thank you so much. 
Same thought to you. It might get worse and endless fixing. 
Maybe I’ll just leave it then.
I see. I’m afraid of sanding because I’m afraid of damaging the paint even on connectors but I guess it’s normal.
Oh hehe. I think it is not noticeable so I will just leave it then.
Thank you so much for the helpful tips. The wall is a kind of cutout paper. Unfortunately, there is no excess same kind of color as the wallpaper. Maybe I’ll try your suggestion to color it but still hesitating since it’s not a watercolor paper. It might not blend well.
Gusto ko yung blind box kase yung excitement talaga na di mo alam ano makukuha mo tas nakuha mo pa yung gusto mo ahhhhh!! 
Great progress, @serenebliss_23!
Thanks for sharing all the tips and little lessons learned. The walls look lovely, and your Nanci peeking through the window is just adorable 
Sabagay. Iba talaga excitement sa ganun. Manifesting for youuu na unang pull, Lycoris Nanci agad. Post mo dito if ever ‘yung unboxing mo. Excited na ako.
Thank you so much. You’re welcome. I hope my tips will help someone to those who is planning to build the same kit. Yes, she is indeed very adorable.