May be of interest to some. I have an aluminum fireproof plate on my M3P with my Cyprus operator ID as per European rules. I thought I would get one for my UK operator number too, even though the print is smaller than CAA 3mm requirement, because the stickers I have used keep coming off and have to be replaced.
Anyway the plate arrived this morning and it was different size to my order. I went online this afternoon to show my brother, as he has a drone too, and now see that they also do them to CAA regulation size and that is what they sent even though I ordered a euro one.
I only ordered late last Thursday evening and received from Germany today.
Indeed, scratch the thin oxide coating off the surface and aluminium will burn with the same intensity as magnesium ribbon. It’s the primary reason why the use of aluminium alloys in ship building was stopped after accidents with HMS Amazon and USS Belknap in the 1970’s.
Worth noting that Germany aside, most EASA countries dont require fireproof labelling.
Its a per country not EASA ruling.
Most places a simple sticker on the outside or a compartment you don’t need tools and letters over a certain size is fine.
I didn’t bother sticking my EASA Op ID on with an aliminium plate. I just printed the QR code and stuck it on the mini 2 battery door with sellotape. Lasted the week and it was ok with the local cops when our tour rep spoke to them on my behalf in Sorrento. They just said be careful over people!