Well Ketchup cannot be used to produce mud
The mud can be done by mixing PVA glue water + sand or dust + Tam paint like earth or nato brown.
you applied it on you MBT with an old brush.
Then we it is dry you can drybrush a bite and apply a coat of gloss, if the mud is wet if it is a dry mud not need of gloss top coat.
Leave a mat one.
Here the color look like a mix of ketchup and meat, sorry mate but you need to clean it with warm water, and do it again.
A part form the mud, it seems that some details are missing on the T-72 like painting the lights.
If the small white spots are snow flakes, you should remove the one from the engine deck = heat.
heat + snow flakes = water.
Anyway, it look promising
Cheers
Seb