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i found a local workshop that will sand blast my alloys as i don't really fancy sanding them down by hand due to their awkard shape   but i have heard stories from people that has wheels sand blasted and ended up with massive dimples on the alloy surface .could anyone confirm what might have gone wrong there any tips etc ? |
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I think most people have them acid dipped these days
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bortaf
Posted a lot
Posts: 4,549
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Depends on the medium used to blast em, i used kiln dried sand and TBH it couldn't even take the laquer off, at least not the decent bits that wern't already lifting, there's no way it would dimple the surface.
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I had my turbo vecs blasted, the first one really did make the machined areas go like pummice, (needed a lot of sanding back ) so the next wheel I gave em, I duck-taped over all the machined areas which did a pretty good job of protecting them. Might be hard on yours though. What about just sending them off to be refurbed professionally and let them worry about it?
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i don't really fancy paying 100s to get them professionally refurbed tbh .
i would rather take my time and sand them down by hand .
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Depends on the medium as they said, I'm a blaster by trade (sorry cant do RR works its for the military!) and also the air pressure and to some extent the person doing them.. from my experiance using a coarse medium (I use 3mm iron grit  ) will dimple most surfaces especially if in conjunction with a high pressure/flow blaster. I also use glass grit.. looks like dust that polishes rather than blasts.. not much cop for paint removal unless you want to spend hours doing it.. So guess you want something inbetween talk to the place doing it anywhere worth their salt should be happy enough to show you what their blaster leaves a metal/alloy surface like. For e I blast with a heavy medium followed by a fine one for parts that need to be paint free and smooth.. That said I am more used to blasting armour plate than wheels! |
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Daily: Spazda Mx5
'A52's Fastest steak eater 2010'
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Tim
Posted a lot
Posts: 3,340
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I would say LOADS of nitromors and a wire brush but on those wheels it will be an  , especially if they have loads of primer like my pug ones did. Yes it will cost to have them dipped, but its also gonna take you ages to them properly by hand. speaking from arm-aching experience :-) |
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i had 4 wheels blasted (or dipped, i don't know), the curb rash delt with then powder coated for £120 and they came back perfect! They even properly masked the bolt faces and mounting face  I spent maybe 2 days and £30 on paint before i gave in and realised i wasnt going to get the finish quality i wanted. |
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deejay
Part of things
WELSH DRAGGIN'
Posts: 635
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Glass beads FTW! I've blasted ally rims before and the glass leaves the alloy untouched but clean as new and yes it will remove paint... Any blasting company worth their salt should know that. If i had more time on my hands i'd offer my services but alas i don't  |
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just dropped them at the sand blasters now ,he is using very fine metal beads at low pressure and he said there wont be massive dimples . i thought it was worth having a go for the sake of 30 quid the lot . he uses a shipping container as a blasting cabinet by the way |
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slater
Club Retro Rides Member
Posts: 6,390
Club RR Member Number: 78
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sand blasting alloy wheelsslater
@slater
Club Retro Rides Member 78
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I dip them first then use a fine grade ally oxide (think caster sugar grade) to take off the corrosion. Works a treat on alloy and steel.
Beads is too much like hard work with my kit!
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Mar 11, 2009 17:13:23 GMT
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i picked the wheels up this afternoon , there are tiny dimples but nothing primer cant fill imo . sadly no pictures as i dropped them to my mate on the way which will 2k primer them for me for free over the weekend |
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Mar 15, 2009 12:19:56 GMT
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primered   will rip through the guide coat with 800 wet and paint them |
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Mar 15, 2009 16:11:18 GMT
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Sorry to go off topic. I got some steel wheels to do soon, i assume i wouldnt have the same problems with them? Only problem they have is rust. What would be the best way to get them paint and rust free ready to paint?
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Mar 15, 2009 17:40:09 GMT
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Did this myself with an angle grinder with a twisted knot wire wheel and drill with smaller brass brushes and a bit of elbow grease.   Back was corroded to curse word so I did the best I could:  You can see some of the pitting but I didn't bother with filler as they are just temporary.  |
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Last Edit: Mar 15, 2009 17:41:25 GMT by claypole
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) will dimple most surfaces especially if in conjunction with a high pressure/flow blaster. I also use glass grit.. looks like dust that polishes rather than blasts.. not much cop for paint removal unless you want to spend hours doing it.. So guess you want something inbetween talk to the place doing it anywhere worth their salt should be happy enough to show you what their blaster leaves a metal/alloy surface like. For e I blast with a heavy medium followed by a fine one for parts that need to be paint free and smooth.. That said I am more used to blasting armour plate than wheels!
