I've been using your models for some time, as the basis for flats at the back of my micro layout. The latest is your freebie steel kit (NB I have actually purchased a number of kits as well!). More work to do but here is the latest, still a work in progress. For the main large doorway, I cut out all the planks and individually pasted them.

https://www.dropbox.com/s/de1lgz4oxsartw8/2020-07-29%2015.53.31.jpg?dl=0
https://www.dropbox.com/s/cza42haqy5y45az/2020-07-25%2011.42.53.jpg?dl=0
https://www.dropbox.com/s/mejvu6ci13yu7ly/2020-06-02%2017.40.11.jpg?dl=0
https://www.dropbox.com/s/jgi9f12ko138a3k/2020-06-02%2017.36.33.jpg?dl=0

Well, having done that, I then decided I may as well make the whole building. Bit of a challenge, but what a pleasure. I got a bit lax with glueing in a few places, which resulted in a bubbled appearance on some of the corrugated iron surfaces, so I simply did what you would do in real life, and covered them up with other bits of corrugated iron. Ditto the front side where I decided I didn't want the upper level door. Here's the result. Little bit more to do yet, but I'm pretty happy.

https://www.dropbox.com/s/lq4o0i0tuev3tq9/2020-08-09%2014.07.42.jpg?dl=0
https://www.dropbox.com/s/32kkyioqvxedkh6/2020-08-09%2014.07.33.jpg?dl=0
https://www.dropbox.com/s/53yhsw0pm97gxef/2020-08-09%2014.07.25.jpg?dl=0