Hi,
Never seen Blue foam, but probably Is the same or at least very similar.
Since it's Handmade there are many Little imperfections....
Here my new corridor, just before the glue coat... I like much more than After coating, but I'm obsessed with scratches
My Plan Is making a big surface totally covered by rooms and corridors... 3x3, 4x4 I don't know... The lava corridor Is 9,5 x 17,5 cm.