The re-issued Revell kit #04719 has also been distributed in several new boxes with new decals. Here seen as the MiG-21 SPS/MF with spectacular demo scheme of the "German" Luftwaffe.
This kit has the same parts as the re-issued kit 04771 with Kroatian decals. It has the same basic old parts as older kits but also the single new set of sprue with new fuselage fairing (for the MF) and a better seat.  

overview of extra upgrade parts in later Revell kits

The real MiG-21 SPS version seem to have "blown" aft trailing edge flaps. I do not know how they are externally different, but it seems to me that a blowing duct is fitted aft of the wing spar in front of the flaps. Some sort of covering plate will probably be fitted between to cover the lower gap. However, no special SPS parts are provided  in the kit, but this is no big issue to me.

You get on the other hand very good CartoGraph decals to finish the kit as:
1- SPS demo aircraft the "new" "German" Bundes Luftwaffe JG-1 squadron with yellow, white and orange decals for the whole scheme; you get a complete set!
2- East German DDR Air Force JG-1 MF with camo scheme as it flew in 1991
... 

I will probably give this new kit a similar treatment as the MiG-21 MF started already (see previous pages). The reason for that is that it gives me another kit to finish in a very nice color scheme, the AEROFAX book inspiring me to make another kit!

All kit got their required putty filling, sanding and the usual preparations before getting their first base coats, for which mat paint Revell 75 light grey is often a very good coat.

a real mig alley.... on the left the uncorrected Revell kit, next the two corrected Revell kits and on the right the MiG-21 F13 kit

The differences again shown between the uncorrected and corrected Revell exhaust area and...

... the wing main undercarriage bay area and....

... cockpit area. The widened fuselage is really a big difference.

 

Bay still unpainted... note details

 Also note the deepened main bay.

It was now time to decide on the rest of the MiG's assembly. The cockpits were not detailed at this stage, but it was opted to go for the paint schemes first. So for final finishing and markings for the three Revell kits, as these were to be completed, first a selection of schemes and paints was needed. 

MiG-21 MF, East German AF (DDR), was a nice model to have in the collection. 

My modelling friend Guus showed my very old DDR magazines covering several aircraft types in use, including the MiG-21. With a lot of propaganda and quite some misleading information, these provide an insight in how people were supposed to think.....

This 1/32 MiG-21MF model got a camo scheme using the [Revell kit, corrected]
Colors were hard to establish but as there are very many schemes and variations the following enamel colors were used:
- Humbrol 118 (about FS 20219/ 30450) brown/khaki
- Humbrol  70  (about FS 20111) Dark brown (very small part at the spine)
- Humbrol IAF green (about FS 24138) green
- 50% Humbrol 65+ 50% Revell no.48 "blues" for the undersides and pylons (very blueish finish)

UPDATE NOTE: many years later I use acrylics, like those of AKAN and Gunze Sangyo: check out my later MiG-21 1/72 scale pages....

The doors were also sprayed separately:

Scheme is as shown in the Revell instructions, scheme step 39; these seem to be accurate looking at pictures.

Main undercarriage bays and undercarriage legs were given a dark grey paint. Decals will come from a mix of the supplied Revell kit (no 4763) and spare decals.

  DDR scheme of kit [2]

 the main gear

    with detailed main bay and wheel leg in dark grey

MiG-21 MF India Air Force with yellow High visibility markings. 
See Page 105 of the AeroFax book; 

Colours used:
- Humbrol 127  enamel light grey overall
- Humbrol   69  enamel yellow, that was airbrushed after masking. 
Main undercarriage bays and undercarriage legs were given an aluminium coat.
Markings will be home made with roundels being adapted from spare decals

                       India AF 
..
  main bay of kit [3] ; note added plumbing and wiring and detailed nose leg of kit [3], the basic leg from the two kit parts but detailed

  main bay (without details of kit [4] )

First the seat and cockpit got a basic coat with the typical russian "blue-ish/green" color. This  was mixed looking at pictures (although it seems ExtraColor has a ready made paint). 

Next, with paints and pieces of sprue etc further details added looking at pictures of the real thing. The main instrument panel is to follow later on... The two cockpits and seats of the modified Revell MiGs  were given a similar treatment.
   Indian MiG
The cockpit windscreen front section fairings were made and the gaps were closed with thin metal sheet made from a wine bottle capsule. Otherwise, it was difficult to get a good fit. 

  Indian MiG-21 converted with windscreen to be painted later.

The DDR MiG windscreen, still unpainted 
 

The plastic seat... (straps made from tape)...
. 
..and the seat detailed...

     Luftwaffe Demo scheme

Also, all kits were given burned metal exhaust cone areas, the green wheel hubs (for which Humbrol 2 enamel was used) and mat green radar cones (for which Humbrol Hu 30 was used)

Masking was done with tape from Tamiya and paper towels for the larger areas. Total airbrush time was two days with overall about 8 hours for all three kits and all basic colors.