concrete on top of coldmix path?

[banana]

We did a coldmix pathway back a while but its never set well and isnt nice to walk on and puts tar on shoes/doormats etc so wanting to do something without having to pull it up. Can I just do a layer on top of concrete/cement or what is best? Has a wood edging that I can conrete to or over and want to leave it in. Even if its just a something that would work short term and look good I'd be happy