I think it is a BIG leap to assume a catastrophic 'blow out' of this rubbed elbow is within reason. This assumption is more on the order of 'the sky is falling', 'what if' and 'awfulizing'. Oh my, what if something DID break? Theres a BUNCH of stuff that 'could break' you have to have a reasoned approach as to where the likelyhood of such a failure lays. You cannot cover every instance of possible failure, time, money and life tend to get in the way of a perfect world.
How deep IS the rub? How much material is left? Pressure or suction pipe? Is the risk of failure WITHIN REASON weighed against the time, dollars and work required to make it 'perfect'? If dollars and time are no obstacle, why not send the whole freakin' car off to some shop and have them double, tripple check and wire tie every possible bolt, scew, fitting or linkage that could possibly EVER come loose? Why don't we build our engines to NASCAR specs, if money and time are no object?
I understand the need to address potential failure areas, nothing I've read in THIS thread leads me to believe THIS part is in immenent danger of failing catastrophically. WORST CASE scenario, in my opinion: Rubbed area starts to OOZE
oil SLOWLY and creates a mess you have to clean up.