I put a sheet of rubber cut to match the cover between the cover and the springs...This also stops contact between the springs and the cover should it get wet, which rusts the springs....
Years back I did have some covers made with the rubber sheet incorporated into the structure of the cover...Ian
I cut a piece of HDPE from a plastic milk bottle ( 3 litre ) to cover the springs
Same story as Ian.
Also used to cut a piece of rubber carpet underlay to go between the seat over & the HDPE plate.
This was wrapped in pallet wrapping ( Glad wrap on steroids ) to prevent it getting waterlogged
I impregnated the hair with spray glue and glued a piece jute over it to prevent future shedding. Together with a piece of fairly hard rubber on the springs it will probably hold out for a while. :+1: :+1: