Looks like watercolour is used...appropiate considering the strip!! Michael Green .he also drew the gnomes later...and Weedy Willy in Oink.
Great balance in the frame layout. Snack-man from Whoopee!! 1983/84/85 Dave Mostyn
http://en.wikipedia.org/wiki/Dave_Mostyn
Images taken from Silveracre at ebay. A great way to see original comic art...I love seeing this and you can really appreciate the skill and control in there line. You can see the changes they made with the whitener...what was cut out and pasted on..sometimes the pencil lines.
http://www.silveracre.com
What great things to own. I would love to see these in person close up.
See more at comicsuk forum
and in the book of The Beano 70 years..well worth buying
Beano Collector's Edition
comicsuk forum post...see more original comic art
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Lews blog