Well it looks like my love affair with bicarbonate of soda as a texture medium has come to an abrupt end!
While getting my minis ready for tomorrow’s showcase I noticed a dusty white bloom on some of them! It has affected some minis where I’ve used the bicarb as a texture medium in, for example, rust or corrosion effects but it was quite pronounced. Most alarmingly although it’s been stable and unchanging for at least a year this all happened in the last few days. My best guess is that it is down to a change in humidity.
A dusting off with a clean dry brush retouching of the paint has fixed the issue for the moment but I’ll have to keep a very close eye on these minis.
As I’ve been promoting the use of bicarb and singing it’s praises I thought I’d better put this warning out quickly! I’m going to monitor the situation closely and look into a permanent fix (if needed) and alternatives.