Great tip, Spiros @fiveten
Although I do keep them, I never thought about using them that way.

Spiros my friend, here's one example of my use of these numbers, sealed with Microscale decal film, from the Hawker GB.

1 attached image. Click to enlarge.

Beside letters and numbers, punctuation marks (periods, commas, etc) are also very useful. In your picture you will notice a period after the year of manufacture on that decal sheet. I used two of the periods from my old decal sheets as eyeballs on my 1/48 RAF pilot figure. Hell of a lot easier than painting them and they look great too.

1 attached image. Click to enlarge.

Another new idea. Thanks for sharing this tip.

Thanks my friends

@seamus1

@bikequeen

@clipper

@johnb

Awesome idea to use punctuation marks, Seamus!