I use one of these for digging. I mostly use the pick for the digging and the shovel side for moving loose dirt.
I used brick cleaner it’s like acid then I use a bit of baby oil to finish them off https://www.amazon.co.uk/Everbuild-Brick-Cleaner-5Ltr-BC5L/dp/B00862YEYC/ref=asc_df_B00862YEYC/?tag=googshopuk-21&linkCode=df0&hvadid=226592631289&hvpos=&hvnetw=g&hvrand=14636882905792751043&hvpone=&hvptwo=&hvqmt=&a...
I soak them in a bucket of water mixed with Dawn soap. Depending on how bad they are they need to soak for a few minutes or overnight. I then start scrubbing with aquarium filter pads, like this. You can find them at pet stores. I like using those because you can scrub as hard as you'd like with no fear of damaging the glass. Some things just won't come out without something more serious, and for that I use brass or bronze wool. But always use caution when cleaning with the bronze/brass wool. And never use any wool on stoneware, ceramics, or bottles with intact labels. The insides are more tricky. I twist together a whole bunch of pipe cleaners and bend it into the shapes I need to scrub the inside. Then I pour some sandbox sand into the bottles, with a little bit of water, and shake it violently. You can use coarse salt if you don't have sand but sand definitely works best.
I soak them in hot soapy water and scrub them with aquarium filter pads. For the inside of the bottles there are bottle cleaning brushes that bend and work great.
I use these paint markers in different sizes depending on the size of the embossed letters. I use extra fine point for small lettering. For the bigger lettering I use the medium/large point.
20 Pack Steel Wool Soap Pads - Metal Scouring Cleaning Pads for Dishes, Pots, Pans, and Ovens - Pre-Soaped for Easy Cleaning of Tough Kitchen Grease and Oil https://www.amazon.com/dp/B07MRKSGQB/ref=cm_sw_r_apan_glt_fabc_HFPY143ZYC47C1J69GP8?_encoding=UTF8&psc=1l
Calyptus 45% Pure Super Concentrated Vinegar | Dilutes to 9 Gallons | 9x Power Cleaning Vinegar | Plant Based | Home and Outdoor | All-Purpose Cleaner, 1 Gallon https://www.amazon.com/dp/B07W9HX3MV/ref=cm_sw_r_apan_glt_fabc_X4BJZ9FD20400N7GHJPV