Aidan coincidentally I have spent the afternoon with Vallejo Matt (I'll get to the gloss bit, give me a moment
)
Right, I have a Badger 100 with the "FINE" head assembly (no idea what measurement) and I have just used vallejo matt varnish straight out the bottle no thinners.. With the air button DOWN on the
airbrush, the pressure is at 20psi and I can vouch for this working very well with no immediate clogging or pooling! Just need to be careful not to increase the paint flow too much.
Right - gloss. I only use Klear and
Tamiya Gloss. Klear is easier to deal with. Put the required amount of klear into the
airbrush cup then add a couple of DROPS of thinner, whether it be a branded one, windscreen fluid, or surgival spirit/alcohol. Then mix and spray on. I am not tempted to deal with klear as a one coat solution - i always apply 2-3 coats with a good few hours in between. Apart from my own cack handedness and overdoing it, I have not experienced many issues doing it this way
Apologies for the war & peace response, but since I've just been dealing with varnish for a few hours, I thought i'd take the time to reply properly - i know how frustratying it is. Always remember - the MOdel T will always be there, you have plenty test pieces, cereal boxes, coke bottles, milk cartons. patience and it will be fine!
Hope this helps.
Stuart