Yes, that should work. On black keys, however, we would rather recommend the edding 780 paint marker. When used on computer keyboards, however, there is no experience of how long the lettering lasts. Due to the strain, the lettering will not last permanently. On lighter keys, we recommend the edding 141 F or edding 142 M permanent black foil pen. However, here too, we have no test results/experience available and cannot make any statements regarding the length of durability.