Touching up scratch/chip on electrophoresis finish

Does anyone know how exactly to touch up a chipped/scratched electrophoresis finish? I have a Rama U80-A Soya that has a scratch/chip on the top surface and i was hoping to touch it up myself with a touch up pen or something similar. Just wanted to ask here to see if anyone has had similar experiences and maybe some tips and tricks for it? Thanks in advance. Attached is a picture of the scratch