I am bedding my HS stock and am looking for bedding material. Brownells has Devcon steel putty and Devcon aluminum putty. Which should I be using? I have a Rem 700 SPS varmint rifle and an HS stock that has a little bit of aluminum in it(behind the recoil lug area and on the side walls and where the mag would go and the back safety are). It think I know the answer but want to double check. THanks so much in advance.