I have a very nice 50th year Commemorative Walther PP .380 NIB. Any suggestions on what product to use to protect it that won't hurt the finish. It's blued with gold inlay and has beautiful hand carved wooden grips. I have Flitz Rifle Gun and Knife liquid paste but wanted to check with some people that have knowledge in this area. I contacted Flitz but never heard back from them. Thank you in advance.