well honestly i dont think theres any paint for the headers and shield that will hold on and not to peal off.I guess u should wait later on when there little bit of money avaialble and buy yourself some dc-sport headers and it will give your car little bit more hp and it will eliminate the heatshield...for interior wise,i recommend to paint your interior all black with duplicolor vinly and fabric paint.i did it to my car and it came out real nice.also try getting ur rug black and some nice ctr floor mats...ctr steering wheel and maybe a si cluster....i mean there tons of ways to improve ur car to look either jdm or just plain nice...