Renovo RBCC 1131 Boat Canvas Cleaner 500ml, neutral

Used this cleaner to remove several years of moss/mildew/mould on a river boat pram cover (been on hard standing for a few years). The cover and boat itself looked very sorry for themselves. This canvas cleaner has definitely helped make the pram cover look considerably better, the amount of green tainted liquid running off the boat was good evidence of how much it was lifting. However, it did still require a lot of very hard scrubbing – do not expect to spray it on and spray it off, although perhaps with lighter “soiling” (like an annual clean) the amount of elbow grease required may reduce.
The product smells very, very similar to degreaser but is about 4 times more expensive if not on a watercourse I’d be tempted to try some non-marine equivalents and compare the results.