[Gimp-user] scan-mirrage-effect-Problem with postcard

["Tim (from Hamburg)" <hh tim e mail ch>]

Hi folks,

i'm trying to digitalis a postcard composed out of 4 different photos 
(without access to the original). To get the highest resolution possible 
i bought me a scanner, but while working grate on normal paper, its got 
problems with that glossy postcard-paper i would like to remove 
digitally. I scanned the postcard once horizontally and once vertically 
in 600 dpi photo mode (see both layers). I rotated one layer and 
positioned it roughly, but i am not in search for a complex ai based 
filter that removes distortions by combining both scans in a complicated 
way, the two layers is just to state my issue.

My question is, is there any filter i can use to remove this 
rainbow-like lines in one of the layers and if so, how could i 
accomplish this things with gimp.

Ill try to attach the file (ca. 40.8 MB xcf file) here, if this dosnt 
work you can download it here:

https://nextcloud05.webo.cloud/s/zJnNawrEHeQ52wY

Password:

nsW8ctvHn!

and send files back here:

https://nextcloud05.webo.cloud/s/RxyW93odREQKqfB

Password:

pp'S6}MQ

Thanks for any help in advance!

Tim

PS: excuse the complicated passwords, they are forced by the provider...

PS2: as expected it didn't work:

> <gimp-user-list gnome org>: message size 55977695 exceeds size limit 25480000
>      of server smtp.gnome.org[2620:52:3:1:5054:ff:fef4:6212]