what is a good spray cleanner for gauges. I have a set of calipers that need a good cleaning, Thay do have some plastic parts.
I use starting fluid for that sort of thing.
Spraying starter fluid/ether on plastic is a very bad idea. Some plastics are OK, some will get a frosty look and others will be destroyed. I use a three equal part recipe of water industrial ammonia and simple green. It must be the industrial ammonia and not the sudsy stuff found at the grocery store….Good Luck.