https://img.discogs.com/CnPqgA4Yzimn...-2320.jpeg.jpg
My copy is as flat as a board, and with silent inter-track grooves. For such a thick LP, it would be near impossible to remove any warp.
Flattening warped records is a haphazard affair. Placing the warped record between two sheets of glass and weighing them down with something heavy such as a car battery often works initially - but the warp can reappear with time, and often does. But sometimes it is successful.
The secret is to apply some heat, and there are a couple of propriatory 'disc flatteners' that do just that. However I have no experience of them or of the results
