Great info on using colored pencils - Prismacolour. Using baby oil is a great element and cheaper to blend colors vs the odorless mineral spirit. Just place a cotton ball with some drops of baby oil (not drenched) on a small jar and wet stump to blend.
Artangel: Mixed media crumpled tissue technique - tutorial - basically, glue tissue paper over a canvas, let dry. Paint, let dry, then rub oil pastel or crayon over the surface to highlight the texture.