jayco hawk pop top canvas cleaning

Hi we have just brought ourselves a jayco hawk pop top. well it says its a hawk on the paper work but it has waht looks like a dove on the van itself ??
Anyway we are wanting to clean the canvas it is very dirty and has mould stains on it. I understand that the mold stains are there to stay but the rest is just very grubby inside and out. Has anyone go any suggestions on how to clean the canvas ? and will i need to recoat with a water repellant after i cleaning. I have read loads of posts and people are saying to use bleach and clod water ? i'm a bit worried about using the bleach .. The van looks great other than the canvas i hope some one out there can give us some advise.
cheers thanks woodsa