Discussion
If you don't mind removing them you can soak them in a bath of POR15 Metalprep and then paint with a calliper aerosol paint. (I like the K2 brand on eBay),
If you don't want to remove them then rub them down as best as you can and then clean thoroughly with panel wipe or some other cleaner that doesn't leave a residue. Mask as best as you can by using plastic sheeting/masking tape etc then just gently rotate the wheel whilst spraying the disk.
NB Obviously don't deliberately spray the braking a surface but its a big deal if you do get some paint on it as after a bout 10 miles it gets worn away by the act of braking.
Although having very little wear these were lft near a garage door where a bit of rain had splashed on them. Was thinking of just replacing them but decided to give it a go first with a bath of metal prep...
Used a builders rubble tub for the "bath"
It took a few days with some agitation with a brush now and again
Followed by a spraying with K2 calliper paint (from eBay)
After a few miles any overspray on the braking surface gets wiped away. Even the score mark shown on the disc has now gone leaving nice crisp edges.
If you don't want to remove them then rub them down as best as you can and then clean thoroughly with panel wipe or some other cleaner that doesn't leave a residue. Mask as best as you can by using plastic sheeting/masking tape etc then just gently rotate the wheel whilst spraying the disk.
NB Obviously don't deliberately spray the braking a surface but its a big deal if you do get some paint on it as after a bout 10 miles it gets worn away by the act of braking.
Although having very little wear these were lft near a garage door where a bit of rain had splashed on them. Was thinking of just replacing them but decided to give it a go first with a bath of metal prep...
Used a builders rubble tub for the "bath"
It took a few days with some agitation with a brush now and again
Followed by a spraying with K2 calliper paint (from eBay)
After a few miles any overspray on the braking surface gets wiped away. Even the score mark shown on the disc has now gone leaving nice crisp edges.
I'm not sure how much that POR-15 product costs (I've used the paint, but not that one) but Citric Acid powder is very cheap and would do a very similar job, though I'd like to find out whether it causes any issues specifically with brake discs. Also electrolytic rust removal would do it too. And I think I'd mask off the friction area before painting - it may just be the photo, but it does look as if there's as much on there as everywhere else.
348jeff said:
If you don't mind removing them you can soak them in a bath of POR15 Metalprep and then paint with a calliper aerosol paint. (I like the K2 brand on eBay),
If you don't want to remove them then rub them down as best as you can and then clean thoroughly with panel wipe or some other cleaner that doesn't leave a residue. Mask as best as you can by using plastic sheeting/masking tape etc then just gently rotate the wheel whilst spraying the disk.
NB Obviously don't deliberately spray the braking a surface but its a big deal if you do get some paint on it as after a bout 10 miles it gets worn away by the act of braking.
Although having very little wear these were lft near a garage door where a bit of rain had splashed on them. Was thinking of just replacing them but decided to give it a go first with a bath of metal prep...
Used a builders rubble tub for the "bath"
It took a few days with some agitation with a brush now and again
Followed by a spraying with K2 calliper paint (from eBay)
After a few miles any overspray on the braking surface gets wiped away. Even the score mark shown on the disc has now gone leaving nice crisp edges.
Or save some considerable time and effort and fit some coated discs like trw or bosch. If you don't want to remove them then rub them down as best as you can and then clean thoroughly with panel wipe or some other cleaner that doesn't leave a residue. Mask as best as you can by using plastic sheeting/masking tape etc then just gently rotate the wheel whilst spraying the disk.
NB Obviously don't deliberately spray the braking a surface but its a big deal if you do get some paint on it as after a bout 10 miles it gets worn away by the act of braking.
Although having very little wear these were lft near a garage door where a bit of rain had splashed on them. Was thinking of just replacing them but decided to give it a go first with a bath of metal prep...
Used a builders rubble tub for the "bath"
It took a few days with some agitation with a brush now and again
Followed by a spraying with K2 calliper paint (from eBay)
After a few miles any overspray on the braking surface gets wiped away. Even the score mark shown on the disc has now gone leaving nice crisp edges.
348jeff said:
If you don't mind removing them you can soak them in a bath of POR15 Metalprep and then paint with a calliper aerosol paint. (I like the K2 brand on eBay),
I was all set to be sniffy about this, thinking it was a knackered old pair of discs you were jazzing up. But no - actually nice job.I think I would have masked the braking surface off, but as you say, that comes off super quick anyway.
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