Your SOYBEAN CAKE, if rainwater can have an effect on ugly to car especially part of eksterior. If llama let, non is unlikely [of] car become mattly, grow mushroom, even possible rust.
Last, what must be done? Don'T let prolonging, immediately clean maximal car 24 [hour/clock] after vehicle hit [by] rain. Use clean water free from dirt kontaminasi and dirt. Will be more be good if/when using warm water. Take bath beforehand with water flattened with sequence start from car roof, glass, machine kap, right and left body, hasp till to part of its edges.
Afterwards clean car by using special shampoo [of] car which [is] PH-BALANCE ber, Shampoo which [is] ber-PH too low ( less than 6) having the character of acid and easy to paint mengkorosi. Shampoo which [is] high ber-PH ( more than 8) basic and will result film detergent ( built-up detergent) causing paint become matt and fade its colour. Use sequence like sprinkle water, that is strarting from roof, glass, machine kap, new [of] kiri-kanan kebody.
After flattening, later;then rinse again with clean water and bone dry mop till by using fiber micro berbahan cloth chamois plas.
[Do/Conduct] treatment [of] care car ketempat one week once, to reach result of maximal. That way, car you'd always seen cleanness. ( From various source)
Surce : inilah.com