I have turned to using masks as much as I can as for me although they take longer I always seem to not be able to get decals to look like painted on as some people do despite going through the gloss, setting, sealing matt process.
MRP are really nice paints and they are like spraying ink so you have to make sure that they are fully mixed. I have put shaker balls in them from AK. You won't need to thin or alter any colours as they are chipset accurate and to match them go with the Vallejo RAF colours for the exterior.
Here are Top Notch masks in action on one of my two 1/24 Hellcats. This is a simple one colour mask
Preventing overspray
Insignia white onto the sea blue.... Yes. It works if you take the paint to the full opacitity by very gradually building up the paint by mist.
Remove masks and tape and....
With my 1/32 Lancaster Dambuster from HK...
Decals used to help do masks layouts
The red is darker. I just made it a little lighter in photoshop.
Painting the camouflage upper surface with Top Notch Masks. You do it the same way as the factory paint shop did it. The base coat with Lancs is the Dark Earth. so that is the first colour and is left to cure. These are Vallejo Model Color and so are Chipset accurate. Once cured the masks are applied. The masks are to cover the brown.
The Dark Green is then painted and the masks removed. Photo taken under bright worklights!
stencil walkways laid out as well as the dinghy hatch.
Because the Lancaster has a sharp strengething overlay the Vinyl masks are not flexible enough to get into the corner so I went to Maketar masks and used their custol mask options for the roundels, squadron Codes, serial numbers etc. I used the Kabuki tape option which gives me the flexibility to get the mask into the corners and avoid bleeding
I worked from known points backwards... I.E the wing root join to get correct and accurate spacing according to MAP paint instructions.
Start of the roundel
Making sure it is properly in place.
Prevention of overspray
White done
Roundel masks inserted to cover the white
Red painted
Masked once cured
remove blue masking section, paint Oxford Blue
remask
remove outer for yellow and paint..
remove masks and covering
Bob is being your uncle!
Finished result under natural daylight and not my worklights
On display over lunchtime at a friends restaurant