A coating system, comprising as separate components: Option 1: (a) a hiding pigment-free basecoat composition, comprising: (i) a basecoat resin; and (ii) a liquid carrier; and (b) and/or (c) as follows: (b) a resin-free pigment slurry composition, comprising: (iii) a hiding pigment; (iv) a rheology modifier; and (v) a liquid carrier; (c) a resin-free extender pigment slurry composition, comprising: (vi) an extender pigment; (vii) a rheology modifier; and (viii) a liquid carrier, wherein the rheology modifier (iv) and/or (vii) comprises an organic rheology modifier and an inorganic rheology modifier; or Option 2: (a) a hiding pigment-free basecoat composition, comprising: (i) a basecoat resin; and (ii) a liquid carrier; and at least two of (b)-(d): (b) a resin-free pigment slurry composition, comprising: (iii) a hiding pigment; and (iv) a liquid carrier; (c) a resin-free extender pigment slurry composition, comprising: (v) an extender pigment; and (vi) a liquid carrier; and (d) a resin slurry composition, comprising: (vii) a resin; and (viii) a liquid carrier, wherein the separate components are not mixed together. Option 1: (a) a hiding pigment-free basecoat composition, comprising: (i) a basecoat resin; and (ii) a liquid carrier; and (b) and/or (c) as follows: (b) a resin-free pigment slurry composition, comprising: (iii) a hiding pigment; (iv) a rheology modifier; and (v) a liquid carrier; (c) a resin-free extender pigment slurry composition, comprising: (vi) an extender pigment; (vii) a rheology modifier; and (viii) a liquid carrier, wherein the rheology modifier (iv) and/or (vii) comprises an organic rheology modifier and an inorganic rheology modifier; (a) a hiding pigment-free basecoat composition, comprising: (i) a basecoat resin; and (ii) a liquid carrier; and (i) a basecoat resin; and (ii) a liquid carrier; and (b) and/or (c) as follows: (b) a resin-free pigment slurry composition, comprising: (iii) a hiding pigment; (iv) a rheology modifier; and (v) a liquid carrier; (c) a resin-free extender pigment slurry composition, comprising: (vi) an extender pigment; (vii) a rheology modifier; and (viii) a liquid carrier, wherein the rheology modifier (iv) and/or (vii) comprises an organic rheology modifier and an inorganic rheology modifier; (b) a resin-free pigment slurry composition, comprising: (iii) a hiding pigment; (iv) a rheology modifier; and (v) a liquid carrier; (iii) a hiding pigment; (iv) a rheology modifier; and (v) a liquid carrier; (c) a resin-free extender pigment slurry composition, comprising: (vi) an extender pigment; (vii) a rheology modifier; and (viii) a liquid carrier, (vi) an extender pigment; (vii) a rheology modifier; and (viii) a liquid carrier, or Option 2: (a) a hiding pigment-free basecoat composition, comprising: (i) a basecoat resin; and (ii) a liquid carrier; and at least two of (b)-(d): (b) a resin-free pigment slurry composition, comprising: (iii) a hiding pigment; and (iv) a liquid carrier; (c) a resin-free extender pigment slurry composition, comprising: (v) an extender pigment; and (vi) a liquid carrier; and (d) a resin slurry composition, comprising: (vii) a resin; and (viii) a liquid carrier, (a) a hiding pigment-free basecoat composition, comprising: (i) a basecoat resin; and (ii) a liquid carrier; and at least two of (b)-(d): (b) a resin-free pigment slurry composition, comprising: (iii) a hiding pigment; and (iv) a liquid carrier; (c) a resin-free extender pigment slurry composition, comprising: (v) an extender pigment; and (vi) a liquid carrier; and (d) a resin slurry composition, comprising: (vii) a resin; and (viii) a liquid carrier, (i) a basecoat resin; and (ii) a liquid carrier; and at least two of (b)-(d): (b) a resin-free pigment slurry composition, comprising: (iii) a hiding pigment; and (iv) a liquid carrier; (c) a resin-free extender pigment slurry composition, comprising: (v) an extender pigment; and (vi) a liquid carrier; and (d) a resin slurry composition, comprising: (vii) a resin; and (viii) a liquid carrier, (b) a resin-free pigment slurry composition, comprising: (iii) a hiding pigment; and (iv) a liquid carrier; (iii) a hiding pigment; and (iv) a liquid carrier; (c) a resin-free extender pigment slurry composition, comprising: (v) an extender pigment; and (vi) a liquid carrier; and (v) an extender pigment; and (vi) a liquid carrier; and (d) a resin slurry composition, comprising: (vii) a resin; and (viii) a liquid carrier, (vii) a resin; and (viii) a liquid carrier,