I used a wingstamp for the first 3 years when I started Harry . despite having water-proof one , still had to do them a couple of times each season .have also been grateful for the odd bird returned via "non-fancier" ,only phoned after getting info off phone ring ,may not have happened if stamped ??
what a cracking piece of kit . this could be usefull for loft & equipment . https://www.aldi.co.uk/en/specialbuys/thursday-16th-january/product-detail/ps/p/portable-steam-cleaner/