I have masked and sprayed the front end of the Fujimi HR31. As I said in a previous post, the decals I have are (a) quite old and (b) the large red and blue sections for the front and back are complex and not quite the correct shades of colour. I decided to mask the stripe transition even though I cannot replicate the finer stripes; this is an homage afterall. The are new release decals available that are a better match colour-wise, but this does not resolve the issue of the complexity, such as the rear spoiler. Also, these would cost more than the kit!
Masked:
Painted Tamiya TS-49 Bright Red straight from the can:
Un-masked:
Now need to mask and spray the rear blue. I will go with Tamiya TS-44 as with the DR30.