A scabs a scab, there are a few things that allow it to heal more healthily/without scarring too bad, but besides keeping it clean there's not a lot you can do.
I'd focus on coming up with a decent story or excuse.. If someone doesn't know u well, tell them you have eczema or the like. If they do know you well, odds are the scabs aren't the sole indicator for your habit.
Good luck, and for future advice, find a fidget toy to keep you distracted so you don't pick yourself. Could help.