I'm thinking of quitting my current band.
It's getting more and more obvious by the day that the singer hates me.
Mind you it's my own fault. I probably shouldn't have married her.
Natural wood every time for me given the option. But it's kind of like cars, where unless it's something especially horrid, then colour is pretty low on the list of priorities. Price / quality / condition rate much higher than colour.
You can get vinyl banners made up with your own designs / artwork at vista print. You just do it all online. It's dead easy.
I always found them quite reasonable.
https://www.vistaprint.com/signs-posters/vinyl-banners?xnid=TopNav_Vinyl+Banners_Banners_Signs+and+Posters&xnav=TopNav
I can't really see how there's any way around sanding. Even if you miraculously and invisibly removed the ink, you would still have the scratches left by the biro. Any attempt at removing the ink with thinners etc would just risk a blotting effect and the ink soaking further into the wood.