i think you may have meant 'acid etched'. A pattern of resist is transferred to the object, usually repeating along the object, which is then dipped in acid eating into the bare parts and not the resist coated ones.
In true pattern welding the pattern goes all the way thru. I'll polish a patch and find out. Hand rasping to hide an etched pattern rather than just using a power grinder seems a bit unusual. Even a bit of hand sanding would eliminate a botched etch better.
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