right ok, so i went to see the anodiser, i had some questions first and he was very forthcoming with advice.
so the problems, the bottle cage bosses etc, they will need removing as they are steel, there are 5 in total, 4 bottle cage insert rivets and one on the back of the seat tube as a mount for a mech verter. then i will have to get the paint removed as he doesn't have the ability to do it in house. i asked if he had a preferred company for that and he said no but he recommended chemical dipping as opposed to media blasting.
so how we left it was that i'll get it stripped of paint, then email him some pictures so that he can assess whether the bare aluminium is in a good enough state to anodise, it may need polishing before anodising, if it is in a good enough state i will them remove the bottle bosses and drop it to him to sort out.
so first thing is a paint stripper, i happened to see Gary from GA cycles today so i asked him who he uses and he recommended Trestan paint finishes in Woolston, apparently they acid dip these frames and he showed me pics of a frame that they had recently stripped and then powder coated and it looked very good. i had used Tresten years ago myself but they were much more industrial back then so the finish wasn't great back then.
so depending on how the frame looks after stripping will depend on what happens, i'll call Tresten tomorrow and hopefully drop it to them next monday, will keep you updated as i go through the process as others may find the info useful.