 Is it possible to over stir my art resin? While it is extremely important to make sure that you stir your resin and hardener mixture for a full three minutes, you really can't over stir. If you stirred for 10, 12, 15 minutes, it's not gonna do any harm. Just keep in mind, you do have a 45 minute window in which you need to start to pour before the resin will actually cure. So when you stir, just make sure that you're going slowly, methodically, and make sure that you scrape the sides and the bottom. Try not to get in there and really whip it, because that's just gonna induce more bubbles than you need. If you do have a ton of bubbles in the end, you can simply torch that out with our artist torch, and it's always better to have more bubbles than less bubbles, because it means that you did stir properly.