valtteri,

Both my spi poles were never anodised. The first was on my P18 and the second is on my F16. Eventually a non-anodised alu tube will colour a little darker grey with a matt feel, but apart from that it holds up just as well as an anodised tube. Anodised tubes will be more silver in colour and shine more.

If anodising is a problem for you then just forget about it. The only alu sections I would recommend as anodised are the mast and beams.

If shine is important for you then contact www.catamaranparts.nl he will send you the anodised stuff. Black anodised if you so desire.

Another trick if you really have to have black tubing on your boat is to powder coat them. Sometimes these companies are more relaxed in what they handle.

Wouter