I wanted to chime in here (both as the Shapeways Trust & Safety Office and as a general community member). As Andrew pointed out, we are doing a lot work and research in the background to rebuild our content policy. After all, it does produce some unintended consequences and definitely needs to be improved.
That being said, we do not yet have a new content policy. We are working with the current content policy which states that we do not print weapons. It also states that we do not print weapon replicas over 10 cm. Technically, this models violates that second part. It is a weapon replica that is over 10 cm.
For the record, the concern is not "gun" in the title. That is NOT what brought this to anyone's attention nor the reason it was cancelled. We do look at different aspects of models when they are being checked. It is not a generic filter that just pulls all models with "gun" or similar and then rejects them. As I mentioned above, this model does technically violate that content policy.
In this case, there is little doubt that this model is not meant to threaten others and that makes sense. We are willing to make an exception to the content policy while we rework the policy. We can work in the spirit of the policy as opposed to the letter of the policy. However, please know that going outside of normal processes takes a lot of communication across continents. There is still a chance that an engineer will review the model without seeing the exception. It is the reality of the system as it currently stands.
Again, we are working on that policy (and system) now. Look for good things to come and to know improvements are coming. In the mean time, work with us and we will do what we can to support you.
(I would also note that two different model files, uploaded separately, are not correlated in any way in our system. If one was cancelled or printed, it will have no affect on the other model and this history from the other model will not be viewable to anyone checking the current model.)