Flocking is a very tricky technique and unless you’re using industrial tools, it definitely takes more than one coat! I know you can buy ‘static grass applicators’ for doing realistic groundcover on model railway layouts and dioramas which utilise a static charge to get the flock to lie smoothly, but shaking it on like seasoning can work well too.
I found this step by step guide by a model horse customiser who specialises in the medium - it’s spread over several posts so apologies for all the links
Obviously I doubt you’ll want your shows to be dapple grey but it’s a good guide for applying different layers and things.
https://m.facebook.com/story.php?story_fbid=pfbid0328dGR5f49E2Bq54739sfDy9Z17Q6SKkA3o5Ack2jXUcbsPT6FHueggV4QnRfWLawl&id=100081776178754&eav=AfZWyB771h01DDRaQCMYr0Gf_rwfPhxFTcp1yVNwIOcjI2gf_FnpSDFtRRXjLeFw-2Y&m_entstream_source=timeline&paipv=0
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