Hello, I have recently started building models and have run into a problem. I have applied salt on the leading edge of the wing using plain water to get it to stick. I let it dry and painted it the next day only to have it discolor (lighter) where to salt has been applied. I am using Tamika XF-76 IJN grey green paint thinned with Tamiya thinner. Does anyone have any idea why this is happening and more importantly, what can I do about it. Thanks.