Here is a collection of 12 brushes.  The ZIP contains a Photoshop abr file which you need to put in your Photoshop\Presets\Brushes folder.

Those who need to use the brushes in a different graphic app can grab the jpg images here.

My intent with this batch was to create some dirt and stain brushes -hence the 'dirty fingers' name. I'm not sure how well I did but hope they will be of some use to you. I took various pices of paper and stained them with stuff I had in the cabinets and then scanned them and made them into brushes. You can preview the brushes in this collection here. 

Click on the image below to see another sample created with these brushes.

Here is a collection of 14 brushes.  The ZIP contains a Photoshop abr file which you need to put in your Photoshop\Presets\Brushes folder.

Those who need to use the brushes in a different graphic app can grab the jpg images here.

I made the brushes using metal and rust textures as a base. Photoshop's brush engine is really powerful so experiment and see what you come up with. You can preview the brushes in this collection here. 

Click on the image below to see some sample textures created with these brushes.