Open your image :
Press control+j to duplicate the layer. Click on Add Layer Mask button as shown to create a mask in the second layer.
Go to image>Apply image :
Click on thumbnail of layer mask and go to filter>stylize>Glowing Edges and apply these values :
While layer mask thumbnail still activated, go to filter>Artistic>Cutout and apply these values:
Now, change the layer style to screen:
Press control+j to duplicate the layer. Click on layer mask thumbnail and press control+i to invert the colors. Now change this layer's blending mode from Screen to Multiply. If you think your image turned too dark than reduce the opacity of the layer.
Press control+a to select all the layers. Press shift+control+c or go to edit>copy merged. Create a new file and paste the copied file in new file. Press control+j to duplicate the layer.
Go to filter>Distort>Ocean Ripple and apply these values :
Now, press shift+control+f to open fade dialog box. Reduce the opacity to 43%.
Open this texture file. Paste it over the second layer.
If you want, you can easily create this texture. First, create a new layer. Fill the background with dark gray color and apply Plastic Wrap filter (Filter>Artistic>Plastic Wrap) setting the highlight strength to 15; detail to 9 and smoothness to 7. Press control+f until you get something like shown in the figure :
Change the layer style to Hard light. Now, use high feather eraser tool and erase the middle part of the image.
Reduce the opacity of the layer to 44%.
Finally, press control+u. Click on colorize. Set the hue amount to 193, saturation to 50 and lightness to 0.
You have successfully converted your image to sx-70 style manipulation.