Anything subjected to more than 156 degrees will not suffer from using a scratched vessel. Your fermentors and bottling buckets need to be smooth and scratch free since they never reach a homoginizing temp and bacteria could hide in a scratch and ruin the brew. I use starsan and BTF (Oxyclean Free) religiously and never scrub too hard on my low temp equipment. You'll be fine with what you have, just watch for boil overs because they make a huge sticky mess.
What do you mean "no Kidneys"???, WTF now I gotta drink less beer...
Join the Automation sub forum in Electric brewing for a discussion of components and control systems. I did!!!!