Stripping an aluminium tank

[Nute]

I found a replacement BMW K100 tank of the correct year on eBay close to me and it seems pretty good and was a reasonable price. 
 

I need to strip the paint off of it so I can check if it got any filler in it and get a better look at the lower shoulders as the things seem to always leak there. 
 

BMW used one tank format from 83-86 and then changed in 86 to a slightly different design with a different fuel level sender, a diff size fuel pump and different tank fixing points. The latter type are more freely available and I had also tracked one of those down as I wasn’t sure I could find one of the earlier type. Using it would mean more welding for different fixings and I’ve decided I’d rather use the original earlier design if I can. I’ve picked up the tank but need to strip the paint off of it. I’d rather not sand it off as it’s a pain in the arse.

Anyone got any experience on aluminium with using Nitromores ?