▁be aver - t ails , ▁became ▁common ▁after ▁ 1 9 3 3 . ▁However , ▁by ▁the ▁ 1 9 7 0 s , ▁f ender ▁sk ir ts ▁began ▁to ▁disappear ▁from ▁mass ▁market ▁autom ob iles . ▁F ender ▁sk ir ts ▁remained ▁for ▁some ▁time ▁longer ▁on ▁a ▁few ▁cars , ▁particularly ▁large ▁American ▁lux ury ▁cars . ▁ ▁F ender ▁sk ir ts ▁were ▁often ▁pa ired ▁with ▁white wall ▁t ires . ▁The ▁extent ▁of ▁the ▁sk irt ▁also ▁varied , ▁before ▁the ▁ 1 9 5 0 s ▁it ▁was ▁common ▁for ▁all ▁but ▁the ▁very ▁bottom ▁of ▁the ▁rear ▁t ire ▁to ▁be ▁covered , ▁while ▁by ▁the ▁ 1 9 6 0 s ▁f ender ▁sk ir ts ▁only ▁covered ▁some ▁of ▁the ▁top ▁of ▁the ▁t ire , ▁and ▁were ▁largely ▁absent ▁on ▁cars ▁other ▁than ▁top ▁line ▁models . ▁For ▁example , ▁up ▁until ▁ 1 9 7 6 , ▁the ▁Che v ro let ▁Cap rice , ▁Old sm obile ▁ 9 8 , ▁Bu ick ▁Elect ra , ▁Pont iac ▁B onne ville ▁and ▁the ▁Cad illa c ▁Fle et wood , ▁De V ille ▁and ▁Cal ais ▁models ▁used ▁f ender ▁sk ir ts . ▁The ▁Cad illa c ▁E ld or ado ▁models ▁sport ed ▁f ender ▁sk ir ts ▁from ▁ 1 9 7 1 ▁th ru ▁ 1 9 7 4 . ▁Starting ▁in ▁ 1 9 7 7 ▁only ▁the ▁Pont iac ▁B onne