there is a heap of information in minti articles related to this search here for drugs.

I think here it is called chroming.  This is a huge concern for the boy himself, his friends he associates with and for you and your husband.  I would try and talk again to your husband and state your concerns, tell him you were not imagining it.  Arrange a meeting between all the couple involved, including his mother and try and sort this out.  You could possibly try and contact a hospital and take him on a tour of kids who have and are chroming.  If shown what it could do ti him he may stop doing it.  But this is a very serious thing, and his birth parents MUST be made aware.  Good luck to you.  And see if your daughter could also describe waht he is doing. 

If you have no luck, just focus on your daughter who was with him and explain that that i snot on and the health effects, brain effects and possible death that can occur.

I would be really pushing it with your partner that you were not imagining this.  The child needs help.  You caught him doing it, you saw for yourself, and he was only with you for 8 days.  A 10 year old can suffer intensely from this behaviour and he needs help.  Your partner needs to have it drilled into him that this is what his son was doing and he needs to talk to his ex about it because the child will need his mother to help him and he will need his father to help him too.  You might need to be there as a friend he can talk to.  Whatever the case, the boy needs help before it's too late.  Talk to your daughter about the dangers of it and have open communications with her regarding this but that son of his needs all the help he can get right now.  I can't stress that enough, talk to him and make him believe you for the safety of his son.  Good luck.

hi hun. i would be VERY concerned if i were you huffing is very dangerous and can lead to furthur drug use later in life, cookclan has done alot of advice on drug use and different drugs so id look in here advices and see if she has one on huffing in particular. id impress on you partner what a serious issue this is and how dangerous it is, if his son is inhaling fumes he could die and may need councilling. good luck with it all