Mostly paint particles.

I decided to strike while the iron was hot and try airbrushing the wings. The set up for airbrushing isn’t quite right yet, but a few small tweaks should get it there. More practice is required. Firstly getting the paint to the right consistancy and secondly getting the airflow/needle balance right.

And patience. Take time and build up the paint slowly otherwise it runs.

Most importantly wear a mask.