Hope you are doing good.
I would like to buy ( a sheet / cardboard ) from Bunnings that closes the back of the rack and fix few dowel pins for adding more shelfs [ Photo as below ].
The width of the rack is 80CM and the height of the rack is 98cm.
Can you please advice the link for
1. The correct item that closes fully the back side of the rack.
2. Dowel Pins ( the holes measure 3mm in diameter - on my measuring tape)
I am planning to nail the sheet / cardboard for permanent placement and the plan is to use it as a shoe rack. The proposed sheet / cardboard on the back will prevent front edge of the shoes making dirty marks on the wall.
Looking forward for your concern to make above rack usable for a purpose.
I hope I can make this rack useful with your proposals as 'It is always easy to throw. But difficult to make'.
The product CustomWood MDF 3mm 2440 x 1220mm White Melamine Backing would be suitable for closing in the backside of the rack. If you take your measurements with you into a store the helpful team members can cut the sheet to the correct size for you.
The dowel pins in your rack seem to be smaller than a standard size of 5-6mm. The easiest option might be to drill out the existing holes with a Ryobi 5mm HSS Drill Bits so they accept standard shelf pins.
Please let me know if you need further assistance or had any questions.