May i post my findings, like i said i really dont know whats going on. I was as confused as anyone else on here.
I had known the tanks were aluminium and that there were two types of alloy Finnish tanks. One was raw un coated finish and the other a coated finish.
At the base of my tank under the seat i scraped away a little of the lacquer and i noticed that there was paint and scrapping away a little paint i saw the raw aluminium material below.
I am going ti try and upload my pictures that i have just taken today of the above. Please bear with me while i try and do so.
You should be able to see the little square that i scraped away from what is under the seat.
The tank is an original untouched 1199R tank.
I am fully awear this could open a can of worms, but the original poster rang a very loud bell.
I have uploaded the pictures Bellow. If you can't see them as you click on them,scroll down because I had to reduce them. But they clearly show what I said above. Thanks.