i have planned to buy a printer and would like to know some information about PLA and ABS.How strong each of these materials are.I have read that PLA is not waterproof and gets weakened with water.If i were to print a cover of a device such as phone is it worth it,how hard can it last?.ABS is Harder than PLA ,so i guess ABS is more of an option for making covers.I would like to know what each of these materials are meant to print.Those people who have had experience with these filaments.Thanks.