I don't have any pirelli lettering stencil so I used the fujimi decals. They were easy to apply but do not have the quality of the tamiya ones.
I followed the usual steps I do when I apply tyre decals. Two layers of TS-13 to prevent silvering on the side of the tyres,the decals and finally one layer of TS-13 and two layers of flat clear (this is the first time I used tamiya's TS-80 instead of mr.hobby flat topcoat).
I also started the decalling job on the body of the sauber. I really love that job... The decals are easy to apply but I needed some attention to the red lines over the grey zones. I don't know if they are really accurate (it's difficult to see in the instructions sheet and also in the reference pictures I have) but I like the result.
I wanted to build Checo Pérez' car but I had a trouble with the decal on the right side of the air intake......
So finally I will have to build kobayaschi's one! I peeled the yellow decals on the camera, the 17th number and the driver's name and I applied the new ones.