Hi Mike, I'm new to spraying and recently bought a new Mini-Mite 4 Platinum, so take my advice FWIW. But I just successfully sprayed some doors a while ago and this old bureau over the weekend using SW Classic. I wish I took some before pictures, it was 70's era brown stain finish. I'm quite happy with the way it turned out.
For the louvered doors I sprayed a while back, I used SW wall and wood primer which I highly recommend for both raw and painted wood. It wouldn't cover the stain on the bureau, however, (being water based) so I used BIN shellac based primer under the SW Classic. I tried some KILZ oil based primer but that is just too thick and sticky for my tastes.
I sprayed BIN primer undiluted with the stock 1.3 mm tip. It has the consistency of low fat milk right out of the can. Sprayed very nicely.
I sprayed both the SW Wall and Wood primer and the SW Classic thinned with ordinary car wiper fluid to around a 25-30 second flow in the viscosity cup (~20%). I also added a dash of Floetrol to each using the large 3M PPS cup. Floetrol I've learned, is not a thinner but a paint additive to prolong the paint's drying time. Also both sprayed very nicely.