yeah, I don't know what it is about aluminium, but if you sand it and then put the resin on later it already started oxidising a layer on the surface so the bond ain't so good. you get a bit of a slurry, which is OK just adds a bit of high strength filler. So you can glass alumiium to join stuff or splice a mast, though it is a good trick if you can get something into the inside of the mast as well as the outside.   doug --- On Tue, 23/6/09, Kim Whitmyre <kwhitmyre@dslextreme.com> wrote: From: Kim Whitmyre <kwhitmyre@dslextreme.com> Subject: Re: [harryproa] Re: diamond struts To: harryproa@yahoogroups.com.au Date: Tuesday, 23 June, 2009, 4:02 PM Interesting! You pour on the 'poxy and just sand away? With gloves on, of course! Kim Doug Haines wrote: > > > So nothing on the diamond strut? > > The trick I learnt on luminium is to "wet" sand the aluminium with > epoxy resin, and there is good bond without the oxidizing. Would not > be easier starting from scratch it is a really nice and light mast, > will work good. > >

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