NOVELTY - A solar coating composition comprises composition-A comprising a product obtained by hydrolysis and condensation of alkyl alkoxy silane compound, tetraalkoxy silane compound and fluorinated alkoxy silane compound in presence of an inorganic acid, and composition-B comprising a mixture of the hydrolysis and condensation product of tetraalkoxy titanium compound in the presence of an organic acid, preferably UV polymerizable methacrylic acid and an alcoholic solution of silver nitrate.    USE - Solar coating composition for coating a metallic surface such as stainless steel surface.    ADVANTAGE - The solar coating composition has better solar selective properties, corrosion resistance, photocatalytic property, easy-to-clean property, better weathering resistance and high stability, and is prepared in a simple and inexpensive manner.    DETAILED DESCRIPTION - A solar coating composition comprises composition-A comprising a product obtained by hydrolysis and condensation of alkyl alkoxy silane compound of formula R-Si-(ORA1)3, tetraalkoxy silane compound of formula Si-(ORA2)4 and a fluorinated alkoxy silane compound of formula R2FSi(RA3)nY1(3-n) in presence of an inorganic acid selected from nitric acid, hydrochloric acid, phosphoric acid and a nano-particulate suspension of silica in water, where the mole ratio of alkyl alkoxy silane to tetraalkoxy silane is 4:0.25, and the ratio of total silicon atoms in the silane to the total number of silicon atoms in nano-silica suspension is 5:1-1:1. The content of the fluorinated silane in the composition is 0.5-20 mol.% based on the total content of hydrolysable silane in the composition, and composition-B comprising a mixture of the hydrolysis and condensation product of 1-5 mol%, preferably 3 mol% tetraalkoxy titanium compound of formula Ti-(ORB1)4 in the presence of an organic acid, preferably UV polymerizable methacrylic acid and an alcoholic solution of silver nitrate.    R=1-8C alkyl;    RA1=1-6C alkoxy;    RA2=1-6C alkoxy;    R2=1-30C alkyl substituted non hydrolysable fluorine;    RA3= non-hydrolyzable alkyl group;    n=0-2;    Y1=1-6C alkoxy;    RB1=1-5C alkoxy.    INDEPENDENT CLAIMS are also included for the following:    (1) a method for preparing composition-A, which involves stirring alkyl alkoxy silane, tetraalkoxy silane and fluorinated alkoxy silane at 10-30 degrees C, adding inorganic acid and nano-particulate suspension of silica in water drop wise under intense stirring, cooling mixture to less than or equal to 15 degrees C, decanting and filtering using 0.2 mu m Nylon 66 membrane filter to obtain coating composition-A, and storing the resulting composition at 5-10 degrees C    (2) a method for preparing composition-B which involves preparing the composition-B by stirring which involves mixing tetraalkoxy titanium and methacrylic acid under intense stirring at 10-20 degrees C, preferably 15 degrees C, adding water under intense stirring at10-20 degrees C, preferably 15 degrees C, diluting obtained product with 50-75% solvents chosen from ethanol, isopropanol and isopropoxyethanol, forming thin layers with thicknesses of 10-100 nm, mixing alcoholic solution of silver nitrate and storing at 0-5 degrees C to obtain composition-B    (3) a method for coating mirror finished pristine metal/stainless steel or oxidized stainless steel surface, preferably mirror finished surface of pristine or oxidized high chromium austenitic stainless steel which involves coating surface with the composition B, performing UV curing of layer B, coating with composition-A and performing thermal curing to form finished product.    DESCRIPTION OF DRAWING(S) - The drawing shows a cross-sectional view of bilayered solar coating generated on an SS 202 substrate.