You are very accurate in your post as a Topy may not bend or flex it it is thick and then pop off....I like the vibram sole protector as it seems to be more flexible when walking. Your step by step about covers it as well. As they say in Hollywood..."that's a wrap"!Good explaination of your applying shoes rubber protection process. Thanks for sharing.
My cobbler prefers the Vibram brand sole protectors. According to him, this sole protector brand is more durable than others he has tried. The soles protectors from Vibram come in a enormous variety of colors. They even had a bright red that worked for my wifes Jimmy Choo heels! These are frequently worn heels that travel. The rubber bottoms make her heels very easy to use/wear. Variety of patterns exist in the Vibram offerings. I have had used a Vibram Tartar which is a plaid rubber pattern on a thin rubber protective sole put onto an older pair of Alden Walkers. Just cause it looked cool. It did not show unless the viewer could see the bottom, but I liked it.
I have asked in the past the process and here is a quick run-down:
(1) If client approves rough the surface with light sandpaper. If not approve, clean with alcohol and let dry thoroughly.
(2) Apply Barge (brand of rubber cement) cement both the shoes and protectors the trimmed soles.
(3) Bond the sole. I have seen the shoe in a clamp contraption and they have used rubber bands and string on my vtg.spade shoes. The leathers covered with flannel. Shoe trees if bands are used are needed. On custom shoes they have asked that I bring the custom shoe tress.
(4) Cure. I was told 5 hours for curing before triming.
(5) Trim sole using a beveled angle.
I see the Vibram sheets (6" x 18") for around $12.00 retail on the web. Vibram Repair Catalog here: https://us.vibram.com/on/demandware...pdfs/vibram-shoe-repair-catalog-june-2015.pdf
(It is important that the sole protector is thin so that it does not negatively affect the designed rocker of the shoe. )
Best, Eric -