Andy Dingley wrote:
On Wed, 03 Oct 2007 20:13:28 +0100, ste wrote:

What's the best way of removing algae etc, its all over a caravan that
has been layed up for a while.

Start with the right brush. A PVC-bristled "spid" brush is better than
the usual washing-up brush, especially in gullies and awning channels.
http://www.axminster.co.uk/product-K...shes-21066.htm

Jeyes fluid is good, and discourages further growth, but it's not the
most powerful. Start with that, see how you get and come back
better-equipped for the sticky bits.

If you're going for acids and you're not an expert chemist, then I'd
suggest buying some ready-made car alloy wheel cleaner. There's a lot of
aluminium trim on a caravan and you don't want to hurt it.

An alkaline cleaner (potassium hydroxide, try "Muc-off" mountain bike
cleaner) is effective too, but can be a problem on aluminium. It's OK on
caravans if you rinse well afterwards, but don't use it on a good bike!

If there's fabric (e.g. Landrover hoods) involved, or old fibreglass
with a porous surface, then a mix of detergent and oxalic acid is best.
You can buy this as wooden patio decking cleaner.


If you're made of money, go to a yacht chandlers. They're the experts on
this.

Thanks, chemicals and elbow grease apparently is the way to go

ste