With a bit of effort, you can make prop at around 200mg/ml, or so I've seen reported. At 10% uptake, a couple of ml per day would make for 40mg per day. It's a valid light cycle for someone averse to injections or, possibly, travelling and unable to do injections. It might be possible to go to higher concentrations since there's no injection pain to worry about.
I've no idea what it would do to the skin.
Nice work, TSO.