Hi Pete
I passed your question on to Nigel Theadom, "Big Nige" of Rig Magic www.rigmagic.co.uk. Here is his response:
"The original black anodised finish contained pigments to give it the black colour. These have now faded in the sunlight leaving the appearance that you describe - in a similar fashion to paint, gel coat etc. The surface of the mast remains anodised, so in structural terms you need do nothing. As far as appearance is concerned, you have two choices:-
1. Paint the mast, or have it sprayed with Awlgrip or similar paint. You should be aware that paint doesn't adhere well to an anodised surface. Although there are special primers available you will find that 5 - 6 years is all that you will achieve before re-coating is required, depending upon your tolerance level to the appearance. For the best results the mast should be stripped of all fittings. Any dents, dings or inperfections can be filled as part of the process.
2. It is possible to re-anodise but the mast, spars will need to be taken to bare tube only and any imperfections will remain visible. There is only one anodising plant of a suitable length in the UK so consider the transport costs and difficulties (not knowing how big your boat/mast is).
In both instances the costs of removing/replacing fittings and the sheer time costs make these expensive options."
Hope that helps!
Cathy
