h_d

Back in the days of Photoshop 3/4/5 about 29 million years ago we would Gaussian Blur and then Unsharp Mask to remove clean up scanned halftone dot. It was a bit rough and ready, but ok for local newspaper repro. Not sure how well it would work on this one though.

I will check to see if one of those items had been overlooked earlier. 
Thanks

Thank you kind Sir.

Thanks everyone. Topaz looks cool might have to check it out. h_d I did something similar but it wrecks the yellow type so I just masked it and copied it and then put the type down after the denoise. When I started in college we had Photoshop 4 and if I remember correctly that was the last version that did not to have an undo history I think ctr-z was all you had.

Hits self in face. I was in Separated Mode and I'd dragged the window so the Status Bar was off the screen. 
EDIT: On macOS 11.3, in Separated Mode, if you drag a document window so the Status Bar disappears off screen, and then back on screen again, the status bar shortcuts are not re-drawn (with any tool the paint mixer) until you switch to another tool.

I'll report this as a bug. 
(And neither of those shortcuts is documented in the macOS Help. I've added that to my bug report.)

OK even simpler:
To draw a cylinder on the Front Plane:
- Switch to the Front Plane, Draw and Adjust 2 ellipses, Snap them as required.
- Switch to the Side Plane, Draw a rectangle, Transform it with a rotation of 60°, Make width and height adjustments with the help of the grid snapping, to the center and the edges of the ellipses.

Same thing happens with Mac OS 10.14.6
And I should add that it occurs in all three applications.
Separated mode. Move window so Status bar is off screen. Switch to finder, go back to affinity, the status bar info is missing until you choose any other tool.

Indeed it does - thanks Walt.

True, you don't have a Save button.
But I think you'll have another button (perhaps Edit Topic), which does the same thing.

Hits self in face. I was in Separated Mode and I'd dragged the window so the Status Bar was off the screen. 
EDIT: On macOS 11.3, in Separated Mode, if you drag a document window so the Status Bar disappears off screen, and then back on screen again, the status bar shortcuts are not re-drawn (with any tool the paint mixer) until you switch to another tool.

I'll report this as a bug. 
(And neither of those shortcuts is documented in the macOS Help. I've added that to my bug report.)

the shortcut is the c key

Could you get one for me too please while you're there?

Could you get one for me too please while you're there?

Other workflows, depending on what you need.
Multi-stroke ellipse – a bit tricky to set up the dash stroke segments symmetrically, but it's possible by trial & error (and possibly by some math, but I don't know which one, haha):

 
Cog clipped by donut, 100% interactive; definitely my favorite:

ade_cog_segments_2color_donut.mp4  

Hiya @designlove and welcome!
Affinity Designer has no user interface for adding plugins. In Photo it's in Preferences-Photoshop Plugins, but there's no equivalent in AD. As @loukash says, the only option is to round-trip into another application for stuff that Designer won't do on its own.

Oh thank you so much, it was driving me nuts 🤪

It may be old fashioned, but I was always told, “when in Rome, do as the Romans do.”  Otherwise known as, let the person tell you if he or she uses or prefers a nickname or a shortened version.  A person’s name belongs to that person.  It shouldn’t be the property of others to change without permission, no matter on which side of which lake, river, or ocean one resides.  Reading James Ritson’s name shortened above to “Jim” set my teeth on edge.  Where, precisely,  did James call himself Jim?

Ok, so I followed Bob in Shades of Grey (Season 2 Episode 4 - https://www.youtube.com/watch?v=I-ousb8-SD0 )
For some parts it was really fun, for some parts it was not - probably because I'm quite a beginner. I'm not an artist at all. I used the following brushes in various sizes: large and mid bristles, broken bristles glazing and detailer, short daub 1 and 2, and the chisel stuff. This was plenty, I struggled quite a bit to keep consistency.
I have no idea if I managed to produce something that is at least a little bit good, but I enjoyed the process anyway, and that was Bob's goal I guess. 
This is my 2nd digital painting in my life, the 1st in Affinity Photos. I chose a black-and-white picture, as I have color vision deficiency. This is the result:

Hiya @Andreas Dietzler and welcome!
No, as far as I'm aware there is no direct way of exporting information like this from the Affinity apps. In Designer, there is the Select>Select Same command which will report the selected number of elements (for Shape, Fill Colour, Stroke Colour and more...):

This displays how many objects have been selected at the bottom of the document window.
It might be possible to export an SVG and parse the resulting file (which is basically a text file) but it's not a project I would care to undertake myself.
 

Some ideas (not a tutorial). Photo is definitely the right program to use for it.
Start with a white fill layer and rasterise it. This will give you something akin to Bob's liquid white background.
Use the Paint Mixer brush with different colours, sizes, shapes and strength settings. Experiment!
Use muted colours - Bob paints with pigments, whereas Photo paints with light. Using the RYB setting for the Paint Mixer brush will help with blending.
 
Auto Load Brush will also help. Clicking Clean Brush will make you feel like Bob whacking his brush on his bucket and spattering the film crew.
The rest is just happy little accidents... and I'm not showing you mine 😆
 

Yes, it definitely does. 

In my case I didn't assign Designer or Publisher to specific Spaces, they automagically assigned themselves. I've now manually assigned the three apps to three different Spaces and everything works as it should (purple background for Photo, blue for Designer, orange-red for Publisher, natch).

If you use Spaces in macOS, you can assign individual apps to individual desktops via the Dock.
EG - go into Spaces, create a new desktop and give it a grey background. Launch Photo, then ctrl-click its Dock icon. Choose Options... and then Assign to This Desktop.
Next time you open a file in Photo, you'll automatically switch to your grey desktop background.
However...
I discovered while experimenting with this that assigning Photo to the grey desktop also assigns Publisher and Designer to it. Whether this is a bug or a feature or either macOS or the Affinity Suite I do not know.

You may be able to improve things somewhat by turning off the default Tone Curve and applying exposure bias by default in Develop Assistant:

(It doesn't help that the flags are up against a large area of blown highlights.)
Above is using the Serif Labs RAW Engine.
(A bit OT this next bit...
This is what I get in Develop Persona when I switch to Apple's Core Image RAW:

I made this second grab immediately after opening the .cr2 file in Affinity Photo, Develop Persona, without any adjustments except for the exposure bias in the Develop Assistant. The flag actually looks more saturated on my screen than it does in the grab.
And this is the exported .jpg, of the image after development, with absolutely no adjustments:

I appreciate that this probably doesn't solve the problem for you as you look to be on Windows, so Core Image won't be an option for RAW development. But it does show that the data is there in the original .cr2 as opened by Affinity Photo.)