That will be for you to decide. Same way you’d do it at home I suppose.
Not being flip. One reason there are no etching and anodizing solutions at the Space is the disposal.
Some of the etchants are really pretty bland and are the same things you pitch down the drain at home. Just we can’t do it here.
Truly, I hope you do one or both classes I expect them to be well attended. Just I have an obligation to warn you. When you submit for class put note at end “All chemicals used will be taken home after use” that way review group will let it go to Calendar rather than a delay asking questions. Trying to help you succeed doing this. Not be an impediment - but protecting DMS comes first for me right now.
Hope to see it on calendar.