I'm flipping wood paneling on a wall and want to paint it so it looks like a plastered wall. How do I deal with the seams so they don't show?

Do you mean the seams between each piece of panelling?

Okay, I can see that you aren't online here anymore. As far as joining the seams, if they are between the boards of panelling, I would think that drywall tape and compound should accomplish the task of making it look like there are no seams.