Used a diamond drill bit with a little water drizzling from the kitchen sink. The hardest part is just holding the drill in place while it makes it's first marks.
Edit: fixed link
If the holes are concentric, there are a few hole saw arbors out there designed to take 2 hole saws that you stack on top of each other - the smaller hole saw acting as a guide for the larger one.
I think the Bosch arbor is the best one. I have one and use it fairly often.
I did an ork warboss with plasticard armor not too long ago.
I highly, highly recommend you buy a multi-size leather punch. You can use it to cut out tons of circular rivets to add details to your panels. Even better is the sheets with the lots of holes punched into them can be added on top to get a nice scrap armor junk aesthetic. The punch is a great modeling investment.
Using cut up plasticard rods as rivets does work but it takes ages, and you don’t get wonderful damaged armor panels to use as details.
With the plasticard try to cut some pieces with uneven and slanted edges, to really reenforce the haphazard construction.
If you have access to any broken small electronics like computer mice or speakers or a remote control, tear it open to look for interestingly shaped pieces of plastic that won’t be easily recognizable.
With greenstuff, using silicon tipped tools is best, but if you don’t have them you can get by with some metal framing nails kept wet to use as a tool to pull the greenstuff and blend it with the body of the toy animal.
3 Camels has this at its lowest price ever. This is a solid roll-pin punch set.
Personally I prefer this Tekton set, but it's been out of stock since March. It's usually $65-70 for the Tekton set.
You won't go wrong with this set though and this set has a hammer.
Maybe you could ask around your friends to borrow one? I got these diamond drill bits from Amazon and just put it into my dad's electric drill. Hopefully you can find something!
Not the best, but cheaper than my time to sharpen. Most of what I do is wood working, so I don't have to worry about them breaking.
you can stack 2 hole saws on 1 arbor for most hole saw brands, or Bosch has an arbor specifically designed for this.
You put the smaller hole saw on top as the "pilot", and the larger hole saw on the bottom. The smaller hole saw keeps it centered. It looks like this.
Magnetizing gets easier the more you do it in my opinion. Amazon sells these tiny magnets with a drill bit. Just buy a separate pin vise for the bit and you’ll be magnetizing in no time. I suggest starting off with a cheap model so you can get the hang of it. I magnetized my great unclean one and it’s nice. Just make sure you put enough magnets to make it hold. These are the magnets I used.
I had an unused hole that was too small. I wanted to put in 1-1/4" conduit so I needed a 1.5" hole. I used one of these with the appropriate hole saw cutter.
https://www.amazon.ca/gp/product/B000WA7A56
It is a bit of a special tool, you may never use it again. I bought mine 4 years ago thinking that someday it would come in handy. First use was for this.
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my last purchase was at amazon: Whiteside Router Bits RU2100 Standard Spiral Bit with Up Cut Solid Carbide 1/4-Inch Cutting Diameter and 1-Inch Cutting Length
Usually, yes. But for just “maintaining” an AR-15, you don’t need a punch set. All you’re cleaning is essentially the upper receiver, the barrel, and bcg. You don’t need a punch set for that. Now, if you’re building one, that’s different, but a punch set is pretty the same.
You can always buy additional punch set later on, they’re fairly cheap.
What you really want to have all bases cover is a mallet/hammer with brass/polymer head and a multi-size punch set.
I bought this two year ago.
https://www.amazon.com/dp/B01M6A4ZA9/ref=cm_sw_r_cp_awdb_btf_t1_xIzoFbFBZB72B
The one I like is from Bosch, which keeps going out of stock on amazon since it seems everyone is stuck at home and going DIY crazy these days.. It's this one: https://www.amazon.com/gp/product/B0000TZZVA/
You can get it at Home Depot or Lowes too.
I mostly use the "clean" cut blades with a higher tooth count. It goes a bit slower but I don't mind as the cuts turn out very smooth looking. If I had a sander I might use the other wood blades more often and clean up any roughness afterwards.
One more fun fact: with a jigsaw you can buy a massage attachment set for about $20 on amazon, and use it on your spouse. A few uses of that and who knows, you might get approval to buy a lot more tools. :)
I also use 1/16" magnets for the subsytems, if you feel like magnetizing those.
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https://smile.amazon.com/MagNetSol-Magnets-Drill-Combo-100pcs/dp/B074SYK3H4
Recently got this...very pleased with the quality. Having the right tools makes the job easier and enjoyable. TEKTON Gunsmith Punch Set, 18-Piece | 66564 https://www.amazon.com/dp/B012TKY0VI/ref=cm_sw_r_cp_apa_i_a4DqCbADQV4BT
They make light duty 1/4" bits these are just an example.
This will convert any impact or the drill I linked.
Either option keeps you under budget.
Awesome. That's great info as well. I worried about going to a 2" pipe, specifically because I wanted to make sure I could do it coming off the disposal tailpiece, and because of the hole in the floor. Check out this doo-dad I found... It lets you basically use 2 holesaws in tandem to enlarge a hole.
https://www.amazon.com/Bosch-HE1-2-Piece-Hole-Enlarger/dp/B000WA7A56/ref=sr_1_1?ie=UTF8&qid=1535561597&sr=8-1&keywords=hole+enlarger+kit
I have a pack of costco bits right now. I assume they are TiN. They come with several of each size. So like 10 1/2 and like 40 1/16 and every size in-between. This is the closest thing I could find online. I am using a mechanics high speed air drill. Similar to this but branded as Cornwell.
I do have speciality bits, such as reverse irwins. Those are amazing. Just guess I should consider buying a set of quality instead of quantity.
I also just bought a drill press. I only had air and battery drills. I guess a good old drill press is finally needed.
I think so too. I got a router bit kit and they seem to be cheaply made. I bought spiral cut up bit from Amazon. Hopefully that'll fix the problem. how should I dial my speed for this bit?
I've been using the borscht blades https://smile.amazon.com/Bosch-T5002-10-Piece-Assorted-T-Shank/dp/B0000TZZVA/ref=sr_1_2?ie=UTF8&qid=1515453930&sr=8-2&keywords=bosch+jig+saw+blades&sa-no-redirect=1
I use the "Clean for wood" for straight cuts and the precision for curves (It also helps to drill a hole near direction changes so there's some relief). If I'm trying to go straight I just clamp up two pieces of 1x4 on either side of the shoe and use my triangle square to get them squared up. Although anymore I just use my circular saw or my table saw for straight cuts... Much better tool for that. With the circular saw, same deal to set up a guide.
I haven't really used the "Speed for wood" blade, but I guess I'd use it if I didn't really care how straight the cut was.