there also seems to be some weird white stuff (thin worm like lines) under the clear coat, is that common in alloy frames?
Yes - it's oxidisation under the clearcoat.
Quite weird as it is more visible in places like the rear bridge but online a thin "line" in others... Does this compromise the structural integrity of the frame? Shall it be treated?
@Howard started
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there also seems to be some weird white stuff (thin worm like lines) under the clear coat, is that common in alloy frames?