If the trace is intact, you really don't have to do anythig to it assuming that it's not loose enough to make contact with anything else.
Other options
tin it with solder to make it more rigid and to prevent oxidation
Apply a fixative to it
solder a wire along the entire length of the bare area
Other options
tin it with solder to make it more rigid and to prevent oxidation
Apply a fixative to it
solder a wire along the entire length of the bare area
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