Maker - Alchemy Skill FAQ and Walkthrough

Of course you still can. They are quests that become available at that level and to anyone over that level (like how most quests are).

I think you misunderstood the question.

Let's see, to forge a weapon, you need to be at least 5 levels below it. HOWEVER, to forge lv 80, 90, and 100 stuff... You need to have the lv 2 skill. That is, making the lv 75 quest to upgrade it.

Same goes for the lv 110 and above, with the lv 105 quest for the lv 3 skill. Since it's all the lv 110 and above, there's no need to upgrade again. At least for now.

This is how it works, apparently. Not knowing first hand, so anyone feel free to correct me.