Thanks for considering this Tober!

According to Botch in the 'Help the Archive Section', "Edits should be on a white background in JPG format, unless it's a Pretender, in which case, contact me. Only experienced image editors, please! You know who you are."

It usually involves cropping the image out of the background and touching it up where necessary. Touch ups are only necessary when for example the scan did not turn up colours evenly or when say the base image is scratched or if there is grime or dirt on the base image that got scanned in.

An example where touch up was necessary.

An example where little or no touch up is needed.

In any event, I think it'd be good to contact Botch directly to iron out the details.