I've got one of these multipurpose ladders
formatting link
which I use all the time inside & out, exactly like the picture but with a stabiliser each end - makes for a very solid ladder.Problem is using it indoors the black feet on the stabiliser can mark walls and if used at a fairly sharp angle the top of the box section can scratch.
Been trying to think of a solution for ages - it finally came to me - a double oven glove! Fits neatly over each end of the stabiliser providing a soft non marking surface!
I was so pleased when it fitted like a (oven) glove.