White paint on the front sight... That's about all you can do for the LCP, that is unless you spring for the Crimson trace laser sight.
clean all oil off area. White fingernail polish as a base. Then Hiviz orange paint over the base. cheap and easy. the picture isn't great, but you'll get the idea.
https://www.indianagunowners.com/forums/picture.php?albumid=1080&pictureid=18025
there is a company that'll mill some sights in for your to look like the kahr. i'll try to find it.
here you go. CUSTOM SIGHTS
for all you get the price isn't bad
140 to mill the slide, finish in moly resin, then install the sights. At least that was the price about a year ago, i don't know if it's more or less expensive now. For $10 more they'll polish your barrel.
***edited because i type dumb.