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The wrong end of a metal tyre lever, I've found this to work very well as it fits the back of a rim perfectly
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Should say the correct end of a metal tyre lever :l
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Is it the old red stuff? If so, it’s shellac-based and meths will take it off better than acetone.
Otherwise, all you can really do is soak it, so douse some cotton wool in meths/acetone/petrol/thinners/(maybe white spirit but use proper old stuff), lay it on the rim and let it soften the hardened cement a bit at a time.
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I've used white spirit followed by scraping with a metal tyre lever, followed by wire wool. Probably not great for the rim, but it should give a decent tooth for the next coat of tub cement or tub tape to adhere too.
SideshowBob
Jonny69
jeff80
@veloham
Removing Tubular Cement
Anyone got any top tips for the really old, dry, thick, hard stuff. Like treacle but on like asphalt only harder? I'm guessing someone is going to say heat! I've just had a filthy morning with a front wheel.
Rubbing with an acetone soaked cloth just tickled it. Previous session with parafin and a brass bristle brush got about half off. This time I tried Acetone and the brush - not much difference apart from a nasty high. Then my dremel with a rotary wire brush and a rough grit buffing wheel which has got most of it off.
I still have the back wheel to do though so would like something that doesn't take 4 hours! I have seem heat recommended elsewhere and do have a little blowtorch somewhere, not sure what the likelihood of ruining the rim is though.
N.B. I tried soaking in Goo Gone as per some other forum thread but didn't even soften it.