Skonn, to me, has 'sco' as in Scot and a sharp 'n' on the end formed with the tip of the tongue curled up to touch the roof of the mouth rather than just behind the front upper teeth. Skawn has the lips pushed forward to make the 'aw' sound as in prawn or born.

Describing on paper what you can hear perfectly well in your head is never easy and I am aware that there are conventions for doing so with wierd upside down 'e's and omegas, but I am really not familiar or comfortable with them. I should be - apologies. I should stay away from such issues!