Any ideas On cleaning upholstery? Yellow stain from head laying on co

This is rec room couch. Kids have played on it, recovered when ill etc for few years- now out of house and deep cleaning basement rec room. Can wash cushion covers but stain on arm rests and seat backs. Will to try anything. If can’t clean then will have to replace so please offer suggestions. Thanks.
q any ideas on cleaning upholstery yellow stain from head laying on co
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