Indeed, WinSCP currently does not support setting S3 ACL recursively.
Can you be more specific about the "mostly does not work" part?

First, let me preface this with saying I am a Mac user but I have to use a PC for certain aspects of my job, I am not a very proficient PC user. We have an S3 AWS server which I am uploading to. I have created the bucket and uploaded the files all fine. On my Mac I use Transmit, in there I simply right click the directory and change the Read and Write permissions to 'World', job done.

I cannot for the life of me find a way to do the same with WinSCP. I seem to be able to set the permissions on a file (not dir) by file basis but this takes ages and mostly does not work.

I thnk I saw somewhere that the permissions need to be set when I create the directory but the option to do that is greyed out.

Is there a way I can do what I am asking?

Thanks

Kai