Originally Posted by Locozodiac
Ok, so stainless steel is not the way to go, you recommend aluminum sheet, what about rubbing against under tubes as would the stainless steel example you gave ? Are you thinking in terms of material thickness ? Can you explain better.
Sorry, been away from the computer.
What I did was set a plate up off the floor using some 4 cm high "feet" with the plate having some clearance from the tubes. I'm going to visit the boat at the mechanic's today (having motor i$$ues) and I'll snap some picks.
You can use stainless, it just isn't needed if the cost is an issue. 5000 series aluminum and some wash-downs with fresh water will work fine.