if i clean up a rusty patch on the under side of a downtube, and cover the whole down tube in heli tape, will it stick and protect a bit from rust?
Probably not. Water will wick under the tape and make it worse. Either prepare it properly and paint it or leave it alone and give it a good slather with an oily/greasy rag.
@Jonny69 started
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if i clean up a rusty patch on the under side of a downtube, and cover the whole down tube in heli tape, will it stick and protect a bit from rust?