Originally Posted by Duality92
That blue drawing ink really goes on hard, everywhere, we use some in our shop from time to time and it's a PITA to get off the hands. On the parts we don't really care as they get sandblasted and painted after.
For your circular saw, I'm not sure how fast you're pushing it through, but if you go a bit slower, you might be able to make the disks last a few cuts longer.
The layout fluid I'm using is a spray on version made by CRC. It is harder to spray on evenly (meaning I'm using more than I should), is softer than the Dykem I've used in the past, and scratches up pretty easily. Once I use up the present can, I'll replace it with Dykem. For smaller markups, I just use a wedge tipped sharpie. It's no less scratch resistant than the CRC. I didn't buy the brush-on Dykem because it comes with a brush now instead of a cotton ball dauber like it used to plus it's easier to spill a bottle than a spray can (yes, I'm getting clumsy in my old age). The next time I have a lot of it to clean off, I'm going to use a sander to get off the worst of it before taking the solvent to it (and make sure I remember to put on gloves!).
The saw is definitely slower that the grinder the disks are designed for. I'm already pushing it through pretty slowly, letting the disk do the work of cutting as much as possible rather than trying to force it (the same as when using a cutoff wheel in a Dremel). I also keep the depth of the disk down into the work as shallow as possible and still have enough to complete the cut. These are fairly cheap disks (the Forneys are under $4 each and the Ace are under $8 for a pack of five) and are pretty soft so they are going to wear fast no matter how slow I feed them. Of course, the slower the feed the longer they will last.
I appreciate the comments; keep 'em comin'!