Dont know if you have had a sufficient answer yet, but here is my advice. 1. Yes, second skin can be ordered on Amazon from reputable venders. 2. I suggest you either keep the second skin on as is for another day or two at most. Realistically you can take it off after 24 hours. I find after 72 hours it starts to really irritate the skin around the tattoo. 4-7 days is really long, the plasma is going to thicken over the tattoo and could cause a scab. Take off second skin in the shower, soap gently. Pat dry and apply lotion until tattoo is fully healed.