Acrylic Varnish

Thanks to all for your wisdom. I am now happily shopping!

If you are struggling to get W&N products, you could try having a look for Liquitex - they make a range of acrylic varnishes which are pretty decent, although they don't come in spray form. Failing that, I would suggest that you try & have a look in an art supply shop, most now carry comprehensive ranges of acrylic products, often including spray varnish.

Short compatibility matrix (thanks to Masataka Narita)

The L E A (Lacquer Enamel Acrylic) Rule: Lacquers, enamels & acrylics can safety cover base lacquers. Enamels & acrylics can cover enamels (but not lacquers!). Base coat acrylics can only be covered by more acrylics.

Acrylics can be sprayed on enamels no problem. In fact, they're almost preferable in that case since they won't react with/degrade the enamel the way a lacquer might (I stress might...).

Just be sure to leave the enamel plenty of time to gas out before sealing it. I have zero experience with Humbrol or Tamiya enamels, but Model Master enamels are usually good to go in 1-2 days. White Ensign, the other enamel I've used, can take as long as a week. Basically when it stops smelling like paint, you're good.

I managed to find Testor's Model Master clear gloss lacquer (which Cadet Chuck suggested). I can get it in a bottle but haven't found in a spray can yet, which is an option but I also found Humbrol Acrylic Matt and Gloss clear in a can. Has anyone used these and can they be sprayed on enamels?

Thanks.

Thanks for the reply. I can get all the major model brands just struggling with some sort of gloss/matt varnish. I will look for ther Testors product.

Thank you

Testor's Model Master clear gloss lacquer, in a spray can, works very well, if you can get it there.  I like it better than Future.  Sorry, I am not familiar with the other brands you mentioned.