I'll do things like removing/smoothing out wrinkles, zits, eyebags etc, removing people from photos, tunning up scans of old photos so they don't look so aged, replacing backgrounds etc.
You pay me 1 BTC to hire me, and then i'll try to do my best, once i'm satisfied i'll send you the result and you pay me whatever you judge it's worth (please check with me first so i can tell if you if i believe i can do what you want me to do with the photo so i'll not need to send back the 1BTC). Oh, and if after accepting a job i realize it's beyond my skills, don't worry, you will get your 1BTC back, you can trust me.
Depending on the work, if i judge necessary i'll show you intermediary stages, previews etc to confirm i'm going in the right direction and if you got any suggestions or comments on my approach to fullfililng the request etc.
Any questions, comments, feedback etc?