loalcat

Seems like I've did it, but instead of acetone I used dichloroethane (popular plastic solvent in my country), Lego shavings turned into something like gel or slime after 10 minutes. So I used it for repairing and increasing of thickness of some cracked Lego Technic pieces I have. 48 hours passed and I took a needle to check hardness of new 1 milimeter plastic layer. Needle easily makes holes in it ! Original Lego plastic cannot be pierced by needle without force but the dried plastic can. Should I wait more? Will it become harder? Or ABS-plastic after dissolving and drying will stay so soft and easily pierceable forever?

I left it for about 3 hours. Acetone is taken from laboratory of chemical paint factory I work at, it is marked "acetone prepared for chemical analysis 99,2%".

Somebody please help. I have acetone from chemical lab and Lego pieces (see picture). I put pieces into acetone but they do not melt! Maybe I need some special kind of acetone?