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> > Both appear to still be good, so I wanted to blast them, paint with POR-20 > > and keep as extras. I wanted to separate them so I would have more flexibility > > when replacing. > I clean the heat exchangers up with a wire bevel brush in an angle grinder and paint them with zinc rich primer. Eastwood do a good one in a spray can, which then looks just like the original coating (which it is!). Cold galvanising is another name for the 'paint' . Most people use glossy grey on their FI runners - it's not the right stuff - this cold galvanising coating is the original stuff. It lasts well, and looks right. Blasting would certainly do a better cleaning job. The coating does not do as well on the hotter parts of a muffler, though. Dave. UK VW Type 3 & 4 Club http://www.hallvw.clara.co.uk/ ------ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~ Shameless link for search engines: http://listarchive.type3.org ~ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~