>>5692364>>5692369 is rightThey're nice for getting any mold release and sanding aftermath off before priming, or for stripping off paint.
>>5692356I think I got my own for $15 off Amazon at one point, I'd recommend it just for the fact you can use it on other things too if you keep it clean
[spoiler:lit]For instance, occasionally glasses if you wear them[/spoiler:lit]