[Supercoolnothing]

For cleaning up Alclad paints I use cellulose thinners the Alclad is lacquer based so you'll have to use a suitable thinner such as cellulose which will rip it from your brush in moments. Createx is water based (acrylic) so the thinner for that won't do anything really about lacquer based stuff.
Word of warning tho the stuff stinks so make sure you open up all the windows or if you can clean up outside even better.