Nobody likes sanding by hand, and to make matters worse, cutting paper to size and mounting it is usually a PITA, too. This generic sanding pad from Auto Body Tool Mart at least simplifies prep part of sanding a bit. It accepts 6” round dual action (DA) sanding discs without any mods, and the discs attach via the same method as the power sanders: a hook and loop fastening system.
You can buy hook and loop backed sanding discs in bulk from any number of sources online, and in any grit you need. The block itself streets for only $14.
Now if they just offered a way to get the same level of detail without having to do the work by hand, I could really rejoice. But any little bit helps.
6” Hook and Loop Sanding Pad [Autobody Tool Mart]