Since Testors is dropping all of their products that were used by model railroaders, including Dullcote, there have been various internet postings looking for an acceptable substitute. This one has concluded that Tree House Studio Clear Acrylic Matte Coating is the best available. Here is the url of the post (replace the "dot" with a dot (.)):
http://www.redhorseartworks(dot)com/red-horse-artworks-blog/testors-dullcote-vs-the-others
There are more opinions out there if you search "testors dullcote discontinued".
Hope this helps if you don't already have a can of Dullcote and your LHS or other suppliers are sold out
