Hi @davetomfish,
Thank you for your question and welcome to the Bunnings Workshop community, it is fantastic to have you with us.
Start by using a QEP 4" Floor And Wall Razor Scraper to attempt the removal. With a bit of force, you should be able to remove a lot of the material. Remember to wear gloves and a long-sleeved shirt as the scraper has a sharp edge that can cause lacerations.
If you are struggling with just the scraper, apply some Tricleanium Adhesive Remover to the tufts, allow it to sit for a minute or two then try the scraper again.
Let me know if you have any further questions.
Jacob
