I've moved your question from 'Ask the PADS Team' to the PADS Layout community where it will have a better chance of being seen by fellow designers.
Create a CAM document "Assembly Drawing", select a PDF or Postscript printer, and you can do full color outputs all day.
Assembly drawing is used to let assembly-line worker to check PBA, so it is prepared by process techinician. He/she use CAM package to output a assembly drawing t by reading Pads ASCII file or ODB++ etc，where he /she will do following things before outputing quality drawing:
1) coloring component outline based on thi's type(TH,SMD), polarity
2) adding assembly instructions
3) completing Pin 1 identificaiton mark if component missed it.
Almostly every CAM pacakge have capibilities to support Coloring component, completing pin 1 idendification etc, and create outline graphics on the fly.
1. Create a CAM document "Assembly Drawing
2. Click Print under “ Output Device.
3 Click Layers Under “ Customize Documents” ( Color Template will pop-up)
4. Select Top or Bottom layer under “ Selected “
5. Select the color and then click “ Items on Primary”
We are using an old method for colouring the Assembly layout ,open the pdf file in paint brush and give the outline to different colours, But I tried your suggested method,its pretty nice and we can also add any Assembly information easily in CAM document ,it is fast process...thanks for sharing the information.