Jason Plato Posted December 13, 2005 Share Posted December 13, 2005 Hello I'm in the middle of refurbing and checking one of my sets of Mike Barnby magnesium wheels. Mike B says to use Alluminium Oxide to strip the centers of paint etc . Does anyone know why alluminum oxide should be used - and what is the issue with using other materials to blast with ?? . I would phone Mike - but hes not in the factory Ta dave C7 TOP Powered by Hellier Performance 😬 South Wales AO Link to comment Share on other sites More sharing options...
metal mickey Posted December 13, 2005 Share Posted December 13, 2005 Dave, Aluminium oxide is not as agressive as other mediums. I would have thought vapour blasting with poly beads would be ideal but if Mike recommends aluminium oxide that should be fine. Link to comment Share on other sites More sharing options...
Mad7ner Posted December 13, 2005 Share Posted December 13, 2005 We had the centres sand blasted with silica sand, No problems at all. A quick sand down and respray, as good as new. 😬 Superlight R No. 97 Link to comment Share on other sites More sharing options...
Rob Walker Posted December 13, 2005 Share Posted December 13, 2005 What happened to the paintstripper idea, is blasting the paint off not going to make crack detection more difficult???????? Link to comment Share on other sites More sharing options...
Paul McKenzie Posted December 13, 2005 Share Posted December 13, 2005 Rob, Nitromors is hard work on the Mags, getting into all the squiggly bits , I did this first then took mine along with Mad7Ners to be blasted . I think it's hard to get a good finish for re-paint just using paint stripper BTW, if you want to dye test for crack testing, then it's eessential to remove all the paint (and probably the chromate passivated coating) Paul Edited by - Paul McKenzie on 13 Dec 2005 20:15:47 Link to comment Share on other sites More sharing options...
Tony C Posted December 13, 2005 Share Posted December 13, 2005 Probably a corrosion problem with some materials - have a look in 7FAQ under corrosion/Magnesium. Aluminium oxide is the preferred substance. BRG Brooklands SV 😬 It seems that perfection is achieved not when there is nothing more to add, but when there is nothing more to take away. (Antoine de Saint-Exupery) Link to comment Share on other sites More sharing options...
Jason Plato Posted December 14, 2005 Author Share Posted December 14, 2005 What happened to the paintstripper idea, is blasting the paint off not going to make crack detection more difficult Originally I was going to strip with Nitormoors and then crack test, but as Paul says above - its a bastard of a job to get *all* the paint off . So now we are working on blasting and then x ray testing. I know you dont need to strip the paint for x ray, but I'm also repainting them Link to comment Share on other sites More sharing options...
david nelson Posted December 29, 2005 Share Posted December 29, 2005 After the centers have been cleaned do they need any specal prep or is it just a can of black spray? David Link to comment Share on other sites More sharing options...
Jason Plato Posted December 29, 2005 Author Share Posted December 29, 2005 Having spoken to Mike Barnby - just spray Link to comment Share on other sites More sharing options...
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