I see a number of issues reported that if an administrator sends a partial refund to a customer via Paypal then Magento receives an IPN that causes the whole order to be marked as Refunded (e.g. https://collaborate.magento.com/magento/topics/paypal_refunds_and_automatic_credit_memo_generated).
Is it possible to issue a partial refund by creating an Online Credit Memo within the Magento invoice view?
What is the best approach for this scenario? Please note that this applies to Paypal Standard (not Express or other integrations).