This low mileage Tona has a swollen tank. Currently drained and “breathing”. Thinking of coating the tank against E5-E10 swelling. Seen Caswell and Flowliner.
Personally I haven't but I have used ian Potter at Tank Care Products Ltd (www.tankcareproducts.co.uk) and he did a cracking job on a steel tank for me. The website refers to fibre glass tanks I would give him a ring and have a chat to see whether his products are suitable.
Just had a reply from Isn, he doesn’t work with plastic tanks as he cannot guarantee the product has adhered. Thanks anyway.