Uh Oh.. Media Blasted Just in time for a cold front... Now what? :(

B

BoostedOne

Like 4 years ago I stripped the roof of a car with abrasive means, and then because of changing priorities it got stuck in the corner of the shop.

Lately temps have been bearable(70s in the day time), just annoying showers coming and going all day. Yesterday I finally got motivated to get that car back out, and since yesterday was sunny I blasted the roof with crushed glass to get rid of the rust that has formed on it from sitting all this time. As I was finishing up, I noticed it getting chilly.

Well, shame on me for not watching the news, but much to my dismay the weather forecast doesn't get out of the lower 60's until MONDAY... by then, I am sure I will have rust forming on the roof due to the humidity.

So now I am in a pickle. My shop is pretty much open air.. So if its 60 outside, its 60 inside. Tenting it is not feasible.

From what I remember, 65 deg is the cutoff for spraying epoxy. Is there some wiggle room to this?

Or I am planning to try to bring the epoxy materials from the shop into the house, and get them up in to the mid-high 70s so the material is cold.

Then set my propane torpedo heater on the hood aimed at the roof in order to try to warm up the roof panel??

How long would I need to keep the epoxy warm? It is just a matter of getting the activator to kick it off, so I shouldnt have to keep the heater running for 5-7 hours would I?
 
Why not just wait till Monday? Any, if any flash rust you get will come off with a scuff pad.
 
I guess fears of not getting all the rust out of some microscopic pores and the thing rusting out down the road?
Monday just seems so far away for bare metal in open atmosphere. If i had to, I could wait and just deal with it, I just get nervous having the metal bare that long. On another car about a month ago I blasted much of the rear and it sat in the same spot exposed and in a few weeks was pretty gnarly. I didn't care as much in that situation since I was also doing some brazing, which would require another hit with the blaster and it wasnt as big of an area.

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I guess fears of not getting all the rust out of some microscopic pores and the thing rusting out down the road?
Monday just seems so far away for bare metal in open atmosphere. If i had to, I could wait and just deal with it, I just get nervous having the metal bare that long. On another car about a month ago I blasted much of the rear and it sat in the same spot exposed and in a few weeks was pretty gnarly. I didn't care as much in that situation since I was also doing some brazing, which would require another hit with the blaster and it wasnt as big of an area.
 
BoostedOne;41691 said:
I guess fears of not getting all the rust out of some microscopic pores and the thing rusting out down the road?
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Was this roof previously rust pitted before you blasted it? Rust does come back quicker and is harder to get out of pits. If it isn't all pitted, you really shouldn't have much trouble rubbing off the flash rust. Maybe in a bad case you would need to DA it with 80.

If you have deep pits, then I can certainly understand your concern. You may have to get creative. Since this is just the roof, maybe you could heat the garage to spay and throw a heated blanket over it after it is no longer tacky? Don't forget, the epoxy itself needs to be warm too.
 
I'm no expert but, have you considered using some halogen lights on the area ? If the interior is pulled out of the car, maybe set a few lights up in close proximity to the underside of the roof . Those light throw off a lot of heat and would probably keep it at the needed temp until cured.
 
fill the propane up, use it. I have the same issues, I do not have a heated make up unit on my booth so I have to rely on the heater. I have a 100lb bottle of propane, and if I need to epoxy something. I set the epoxy in the booth while Im heating it for an hour or so, than I spray my epoxy, let it evacuate the fumes and resuming heating. I let the booth get to about 100 degrees, than cut heat off. I monitor the booth and when it gets back down to 70 I reheat. I repeat the process for 4-6 hours or as long a I am at the shop, when I come in the next day I heat it for another 4-6 hours. Not having a heated booth, or heat lamps or electric forced air heaters to keep the booth warm all night kind of sucks. But that cost gets rolled into the cost of the job, plus the epoxy is awesome and a step I would not ever skip.
 
man...60, what a horrible life!! :D

It's currently 4 here, 'feels like' is -12.

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man...60, what a horrible life!! :D

It's currently 4 here, 'feels like' is -12.
 
-15*F THIS MORNING WITH A -35* WINDCHILL, SHOP IS 65* but it's eating firewood like crazy right now. We won't see 60* till June
 
Bob Hollinshead;42220 said:
-15*F THIS MORNING WITH A -35* WINDCHILL, SHOP IS 65* but it's eating firewood like crazy right now. We won't see 60* till June
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Funny-meme-die-winter-die.jpg
 
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