Note that instructions say it needs to be clean and dust free otherwise it won't adhere. Think of dusting a worktop before laying dough. If its anything you can't get 100% dust free you spray it with water (I guess dilute pva would be the best?). But from previous experience if the surface is dirty it just falls away and makes a mess everywhere. I'd put a tenner on that being the reviewers issue.
As I said you've got to weigh up the amount of use. If one can will do, then just spend the £8 or whatever, don't over think it and follow the instructions.
If you've got loads and will be using it a lot, then spend the £20 on a gun, £10 on cleaner, and £10 on one that matches the exact requirements for each purpose.
Note that instructions say it needs to be clean and dust free otherwise it won't adhere. Think of dusting a worktop before laying dough. If its anything you can't get 100% dust free you spray it with water (I guess dilute pva would be the best?). But from previous experience if the surface is dirty it just falls away and makes a mess everywhere. I'd put a tenner on that being the reviewers issue.
As I said you've got to weigh up the amount of use. If one can will do, then just spend the £8 or whatever, don't over think it and follow the instructions.
If you've got loads and will be using it a lot, then spend the £20 on a gun, £10 on cleaner, and £10 on one that matches the exact requirements for each purpose.