First One
First thing that hits me is that its quite boring, there is no depth to the sig at all, maybe invert the brushing layer and the background layer, give it a brightness and contrast and make them both high.
Then give ita a1pixel border and make the render a bit smaller and blend it. The idea is good just not how it as been done, just looks asthough its been rushed, the best signatures have had hours of work on themIn my case the longer i spend on a piece of art the better it is.
Second One
Its pixel stretch which loses its mark because its so simple even though it does look good, but the first two things that hit me is the fact the render aint blended and the brushing is the same.
To blend it duplicate the layer(CTRL+J) put the layer underneath the render layer and give it a 4gaussian blur, do those seps again but use motion blur with the degrees at 0 and fiddle wit the setting so it looks good, normally approx. 150, then duplicate it, merge and lower the opacity.
Get rid of the brushing layer because it looks as though you used one brush, try some grunge brushes...
If you want any help or details on how to do things im on msn now, bencrook76 AT hotmail.com