OK. Good thing I asked already. I have only made something with the fine particle-stuff three times, so no harm done
But would the garage still be bad? It is rainy outside almost every day at this time of the year, so my things could get wet... and the wind would probably hurl a lot of stuff into the air?
But I am right that no harm is done by these few times right? It was just 3, 6 and 10 grams of flash powder. Dont worry, I am not going to go over 10 gram at a time (about the sensitivity - not really related to this..)