The primary mode of reaction between kerosene and bromine would be addition of Br2 to any carbon-carbon double bonds in the kerosene, Kerosene is hydrotreated to get rid of alkenes, but there might be some residual levels. So the first drops of Br2 might be decolorized. After this, the red Br2 color would intensify as more was added. In the dark that might be the extent of any reacton; in the presence of sunlight free radical reactions would take place with the formation of bromoalkanes and HBr.
These reactions are: RCH=CHR + Br2 ---> RCHBr-CHBrR and RCH2-CH2R + Br2 ---> RCH2-CHBrR + HBr