sticky marks on DS's school blazer - please help!

[runner2]

It doesn't seem to be chewing gum, could be glue... Looks awful and I can't get it off! Tried scraping, wetting, rubbing with damp cloth but nothing is helping at all, and I know just treating with pre-wash stain remover then washing it isn't going to work. I'd be very grateful for advice.

Sticky Stuff Remover? I got some recently and it's fab, cleaned sticker remnants off DD's uniform.

Just asked my DH - he is the expert in my house.
He said can depend on the glue.
if it is glue, so he has 3 suggestions
Put it in a plastic bag, tie tight and put it in the freezer - it may be possible to chip off when frozen
or
Turps substitute - try a small area first
or
Cigarette lighter fuel - again try a small area first
Good Luck!

Stain slayer spray, in aldi or Lakeland.

De-solvit pre wash spray from supermarket. It removes sticky marks, chewing gum, etc plus other tough stains

www.tesco.com/groceries/product/details/?id=250707542 - looks like this

I had to do something quick - no time to shop for anything overnight - and I suddenly came up with the idea of a good old-fashioned net-type cloth, wet, and a bar of soap. Just rubbed the soap in with the abrasive cloth and scrubbed vigorously, which gradually lifted the glue. Then just rinsed with clean damp cloth and hey presto - it worked! Thanks for your help everyone.

I've just read the thread title as 'skid marks'