Question for fellow creators—-pressure treated fence planks

Submitted to Community Chat

Hello. Quick question about those of you who have posted projects using pressure treated fence boards.

Are there any circumstances to know about using pressure treated wood? Does it respond well to indoor stain and paints equally.
Are there any special prep steps necessary?

About to do my first project with a routine big box fence board plank....not sure how it reacts to paint or stains that not meant for outdoor decks or fences. Thank you!