Use Acrylic Mediums
There are acrylic mediums that can be added to the acrylic paint to extend the range of effects you can achieve. The acrylic mediums can make the paint dry to a glossy or matt finish. Other mediums can give beautiful metallic effects or add textures like sand or small glass beads.
(The metallic mediums are especially effective on dark colours.)
There are a wide range of acrylic mediums that you can use. Be sure to check out the range I think you’ll be pleasantly surprised!
Apply the Paint without a Brush
You could also try applying the paint with crumpled paper towel or thin plastic for a random textured finish.
You can paint your backing paper to co-ordinate with your other card making materials which will save you both -
* time spent looking for just the ‘right’ paper
* money as you can use the paints that you already have.
Rip instead of Cut
Another idea is instead of cutting the backing paper you could rip the background paper for a different look.
You’ll find that ripping towards yourself will give a different effect compared to when you rip away from yourself.
The size and shape of the exposed edge will be different. On dark coloured surfaces exposing the white ‘centre of the paper’ will give a white border that can be very pleasing.
This all adds to the variety of effects you can achieve. This is a great way to make your cards individual and special, so that they stand out from the crowd.