DIY Network

I am in the planning stages of painting my first wall mural using a projector. I would love any advice or creative suggestions! This will be for my sons' room and will be a LEGO theme. Thanks, in advance.

What advice is it your looking for? The only one I would suggest is to make sure it's all done without doing a raised surface of any kind.
The Lego theme is cute but he will soon out grow looking at it and it will at some point need to be painted over. So make it easy to do.

If you have very nice and smooth walls, my suggestion is to possibly use 4x8 sheets of lightweight homasote sound insulation board? Then you could attach these to the walls with just a few screws with washers in the corners, prime, paint with your projected design.

(Chalkboard chalk works well for drawing in, as you can paint right up to or over the chalk, and it won't show through like pencil)

Advantage with the homasote, when the Lego theme is old, it can be painted over and becomes a wall size bulletin board that will easily accept push pins without wall damage underneath. (Some home stores carry it, some don't, often available at commercial lumber yards, however)

If you end up painting directly on the wall board, do as joe suggested and keep texturing and heavy paint to a minimum. Using liquid acrylic craft paint or diluted acrylic artist paints should both work well. You will probably still have to do a light sanding on the wall when it comes time to paint over the mural. So keep that in mind before adding heavy paint lines.

A glaze coat of clear acrylic medium over the entire surface when complete, will help protect it, unify any sheen and keep it more cleanable.

Try to involve your son as much as possible, and create great memories.