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Removing Mold Prep?

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13 March 2004, 10:30
gzig5
Removing Mold Prep?
I need to remove Midway mold prep from the cavities of a couple of aluminum molds. Is it as simple as using brake cleaner or alchohol on a q-tip? Anything I need to look out for?
Greg
13 March 2004, 10:34
aladin
To get them clean of all debris scrub with a kitchen cleaner like Comet or BonAmi using an old toothbrush. For the most stubborn areas stray-on oven cleaner allowed to sit around 10 minutes or so gets them.
13 March 2004, 12:54
bfrshooter
Hey be careful with oven cleaner, it is very hard on aluminum.
13 March 2004, 17:57
Newtire
Hi Gzig,
Never had to use anything more than either carburetor cleaner & a Q-tip or denatured alcohol. Watch out with flames from your casting operation going on! then I heat both sides with a propane torch evenly to get out the moisture, swab em out again, smoke the thing good with a match, go for it.
Newtire
14 March 2004, 04:22
courtney plater
Be sure to have saftey glasses or a face shield with the spray brake cleaner. It really sucks when it splashes back into your eye.
15 March 2004, 02:43
shooter2
Besides it tastes like s*** if you get any around your mouth.
Jim
15 March 2004, 03:58
aladin
Quote:

Hey be careful with oven cleaner, it is very hard on aluminum.



I'll check to the oven cleaner being aggressive on aluminum. But I've used the older version which didn't work as fast as the new formulations-- and heated the treated block in the oven for more effective cleaning. While the block did turn slightly gray the block was unaffected in any other way. This with over 30 minutes of heating. Sure gets them clean though and removes stubborn trash not easily cleaned off.

Just monitor the effect of the oven cleaner. When it'll brush clean, rinse and rewash with a strong detergent and hot water.