Thanks a lot for your comments @johnb, @gblair, @fiveten.This week I started with the filler and grinding. That's really not my favorite stage on the build...

Before sanding:

After sanding:

And the surprise: a small hatch is gone on the starboard side of the nose at least I think it was there before. If so this one was moulded on the kit. Now I will try to have a close up picture of the real BD to check what was there... More details in the next episode...

Just caught up with your build again, Yann, some great work done already, really looking forward to the painting.

Filler is a necessary evil, but looks like it is going well, @yann. Looks good.

Thanks a lot gents @johnb, @gblair, @fiveten, @chinesegeorge. I continued the kit with the ailerons and their activators kind of pilons underneath the wings. And they were not matching at all. Ok, nevermind, I will cut off the nib which were supposed to hold those flaps. And then appear a bit gap in between the pilon and the aileron (sorry no pics of those). Then my old good friend came to rescue me ''Tamiya filler''

Since there are a lot of details on this area, I decided to not sand the filler but straight after application to level it with acetone on a cotton wool.

Afterward some more antenna and air intakes

Eventually, it will be time for primer so first off: Masking the canopy and wind shield. I have to say those are matching pretty good.

Thanks indeed for that tip, Yann @yann
Not sure if it will work on acrylic putty as well, usualy I use plain water and cotton, but maybe aceton will perform better. Will definitely try your tip.

Thanks a lot guys. I tried this and it works pretty well on the putty. But on the other hand the plastic become a bit tarnished. I'm normally brush it with iron wool to get it clean. The acetone is vaporizing very quickly, that's why I'm just dipping my cotton stick and the leveling the putty. Moreover on this kit I tried on dried filler (abt 1 week) and it's still 'cleaning the excess of putty.

Thanks a lot Erik @airbum. You are fully right the 'light and sift sweep' I think I was not so light on this Delta, we will see...