Hello Kreston,
As you prepare to cover your model with Aviattic's Fokker triplane decals, take some time to test a few strips.
For Voss' machine: After a grey primer, I painted the model with Tamiya's AS-5 (Luftwaffe light blue), then I added a mix of light blue and grey streaks over that. Cover all that with gloss of course. Then apply your decals (with just a little bit of micro set over them to help them adhere over curves...not too much!)
Give the decals a day to dry. I used acrylic paint to brush a few more streaks over the decal here and there, trying to get colors and streak patterns to match what I think is correct (with colors of course, this is up to debate, but a bluish/greyish hue over the green is what is usually described for Voss' triplane). Then after another day of drying I sprayed it all with Testor's Lusterless flat. Then I brushed Vallejo's Satin Varnish over everything, giving it a semi-glass, streaky, not too perfect finish (again, trying to mimic those photos).
Good luck with your model -- let me know if I can help with any advice!
Best wishes,
Jason