My marks are visible for a day or so afterwards and I suppose if I look closely I can see some older sites, but they’re not open wounds, just slight blemishes that fade. I don’t put anything on them, I just let them fade. If I noticed one was looking angry I might look into putting something on it, but in 5 years of pumping I’ve never had to do that, they’ve all healed perfectly well on their own.
If you’re really keen to put something on them, I use witchazel gel on insect bites to reduce inflamation and itching, might be worth looking at that? I’ve no idea if it would work, but it does have the benefit of not stinking to high heaven.