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LM5050-2: Is it normal that LM5050MK-2/NOPB surface failed the acetone test?

Part Number: LM5050-2
Other Parts Discussed in Thread: TEST

Why LM5050MK-2/NOPB have below nonconformities? Pics attached.

DC:2101+5 COO:MALAYSIA

1.The parts look sande and have a layer of additional paint

2.The markings failed the acetone test