I plumbed in a garbage disposal and faucet set into my new granite counters today after waiting a day for the silicone to seal. The faucet and knob had rubber washers underneath, but the sprayer and soap pump had nothing. Following the instructions, I used a bead of plumbers putty underneath each. Now I'm reading that the putty can discolor granite. Will such a small application cause problems? If so, and I pull it immediately and replace it with clear silicone, will I be allright, or am I already screwed?