1.) Start with a black base. Any size you want. I chose to stay with the standard 100x100 =D
2.) Next, open up your brush palette and enter these settings:
Size Jitter: 50%
Angle Jitter: 4%
Roundness Jitter: 2%
Check Texture and leave it (It should be in the default Bubbles texture, if not, change it)
Opacity Jitter: 100%
Flow Jitter: 100%
3.) Choose a brush size. I chose Soft Round 7 pt brush.
4.) Now use the brush on the parts you want of the canvas you want.
5.) Open up a new color fill layer (#F1CD7B), set to Color 100%
Optional - 6.) Merge and use a Unsharp Mask with these settings:
50, 1.0, 5
And you're done! =D YAY!