Spicknspan,
Mike only put that as a wind up re your earlier comments on 'MS'.
First thing to work out is whether its real or fake suede , if its real don't touch it with water.
Next problem is the sort of products one would normally use to remove biro, acetone(nail varnish remover) or hair spray containing ether , may cause fake suede to delaminate causing a bubble.
Best to try first with a detergent , then 'MS' , then if no luck prequalify and try acetone on a cotton bud.
Cheers
Doug