Short answer-yes if the sights are plated or of stainless steel.
And the brighter it is, the worse it'll be.
Real answer-darken the top strap/sight notch/blade with either a candle, cigarette lighter etc. I think Brownell's even sells a dedicated easily removed paint for it too? But the two tricks above "sooting the sights" is a classic old bullseye shooters trick to flatten and darken sights.