So apparently, it's pretty easy to use the fancy brass etchings from Forge World. I recently picked up a drop pod commission (for a Deathwatch squad) and adding the Forge World Inquisition etchings was a breeze.
All I used was my trusty X-Acto blade to cut them from the sheet and then trim away the last little bit of excess along the edge and I was good to go.
A word of caution though, these things are tiny and can be difficult to handle and glue into place. I used the tiniest amount of superglue and it was more than enough for these... use too much and it will spill out from behind the edges and make everything a mess.
I added a seal to the outside of each door and then a smaller one on the inside as well. I needed to use a small piece of plasticard to cover an opening in the back wall of the pod (it's the old FW resin drop pod and it came from ebay already assembled). Once painted though, you'll never know these were added after the fact.
It's amazing the amount of detail in these things.
Now I just need to figure out a suitable paint scheme for this model.
Here's trick to adding smaller brass etch to models.