The last time I had worked on my mini barn, I'd had to stop due to two problems:
The white marker that I had used looked cream on the wood (left arrow) and the green marker, despite my having used the fine point end, bled into the wood around it (right arrow.)
I had another white marker, so I pulled it out and tested it on a scrap of the wood. (Red circle.)
That pinkish spot is not white. It was time to get out the paints. Which wasn't too hard since my NaMoPaiMo model and paints were also on the kitchen table. (The craft table in my office where I usually work is covered in sewing projects at the moment. I don't want paint anywhere near my sewing.)
The first coat of white paint went on well and partially covered up the green that had bled into its surroundings.
After a second coat, I was getting the white color that I had hoped for and the green was only faintly visible.
I tested the fine end of the green marker after the white paint had dried. It didn't bleed, but the line that I drew wasn't very straight. I tried stippling a line but that didn't work too well, either.
Maybe I would have better luck using a fine tipped detail brush? I practiced some lines with the detail brush and some green paint, and those looked worse than the lines I'd drawn with the green marker. I simply was going to have to use the green marker.
Since I drew lines on the board daily when teaching, I decided to quit worrying about wobbly lines and simply DRAW them. I took a deep breath, marker firmly in hand,
and SUCCESS! While my lines are not perfect, they will do for what I want.
Next step? Assembling the barn. Stay 'tooned!