Before you continue reading please note that I'm not telling you to do the following, I'm only telling you what has worked for me in the past. Chemically stripping glue will dry out and could damage the base material.|
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I've heard dozens of ways to remove skin glue off bases but I know one simple way that for sure works and that's lighter fluid. I spray lighter fluid on the base and wipe it off with "Handy Wipes" and white paper towel. If the glue has been on for a while you may need to do this several times. If you stop seeing glue on the white paper towel then it is most likely all off but leave it for 30 minutes and run your hand over the base. If it still feels a little sticky or tacky then a base grind or two may be required before waxing as the glue could be deep in the base material. This process drys the bases out a lot and after it air drys you should do at least one iron wax job using a warm temperature or storage wax.
The other method I will mention here is the "paper bag" method. I've heard that it works but I have never done it myself. The process is to take a plain paper bag, place it over the base where the glue is and heat it with a house iron. The result is the glue sticks to the paper bag and is removed from the base. I don't own a house iron so I have never done this method. In my mind adding heat to the mess sounds like a good way to press the glue deeper into the base material but I've been told by a few people that it works great, so there you go.
Online you'll likely find a ton of people telling you how hard it is to reglue skins and that you are better off just buying new skins. It's bullshit written by people with more money than time. Reglueing is a straight forward process that fairly simple and not all that messy if you have a good setup and proper tools.|
Tools: A stiff drywall putty or taping knife that's not as wide as the skin. A pack of white/blue "Handy Wipes" or another thick cloth that you will end up throwing out. White paper towels. Parchment Paper. Home iron or hair dryer. New skin glue (I use BD Gold Label).
Make sure to read the directions on the skin glue you purchase in case it is different than the following.
Step 1: Warm the old glue up to make it easier to remove. You can use a hair dryer or place parchment paper over the glue and run a home iron over it quickly several times.
Step 2: Scrap the glue off with the drywall putty/taping knife. Wipe the extra glue onto a "Handy Wipe" (or another thick cloth that you will throw away) to keep the area from getting messy.
Step 3: Run your hand over the skin, do you still feel a little glue? If so you can chemically strip it with lighter fluid. Pour lighter fluid on the skin, let it sit for 5 seconds and use the putty/taping knife to push the liquid off the skin. Use white paper towels to adsorb the liquid before it gets all over the place.
Step 4: Once you can no longer feel any glue on the skin dry it with a hand dryer. You need to remove ALL of the old glue before drying. All of this will be for nothing if you leave a little patch of alien slime.
Step 5: Pour new glue on the skin and wipe a thin layer covering the whole skin as evenly as possible. Working in 10cm sections has worked for me (instead of pouring glue on the whole skin and attempting to spread it in one go).
Step 6: Cold cure the glue. I place the skins I reglue in my van (open the windows!) overnight, (or for whatever time the glue directions say).
... leave any of the old glue on.
... reglue skins and start using them shortly after.
... fold reglued skins before the suggested cold cure time.
... do the process in a small room with no vents.