I'm OK with doing a slapdash job. I shouldn't be, but I can't afford the time or materials for much more...especially when it's likely to be redone soon. I'm about half tempted to just do it with putty or something.
*sigh*
OK - this is one cheater thing that might work.
White bathroom caulk in a tube, buy the caulk gun too, would probably be flexible enough to last a few months without cracking. Put it on and then smooth most of it off with a wet cloth, do it more 'coats', not just thicker, if it doesn't cover in one application.
Remember, if you ask the hardware guys, they're likely to try to "upsell" you anyway. Do your homework before you go and you'll know how much of it is crap.
I absolutely love going into computer stores. They treat me like a ditz for thirty seconds and then the look on their faces when they realize I know what I'm talking about.... too bad it can't be the same way with cars and hardware.