This is my attempt at lapping an old HS. It was done with 400 grit then 600 and finally 1200. After that rubbed with some bicarb toothpaste and then brasso. Things I learned: Dremmel is way too fast and not delicate enough. For large grooves its ok but for fine smoothing not ideal (you end up with wheel marks everywhere). Toothpaste works great! Patience is required. Brasso works better than expected. Be careful of the edges of your HS Cost Wet/Dry Sand paper from screwfix.com 2.79*3 1 at each grit. You get 10 pcs for that price. Cloths from sainsburys, simple dust cloths 2 for 0.97 or something like that. Brasso sainsburys about 1.60 Toothpaste something i had round the house. Hope this helps anyone who is looking to do this.
Looks great; but you may want to wipe it down with rubbing alcohol. Brasso can leave a layer of residue (polish?) which, although making it look shiny, could interfere with heat transfer.
You are absolutely right. The HS was bathed in water, left to dry and then cleaned down with alcohol gel.
A sure sign of a good finish on metal is to have a distortion free reflection - well done, a very nice job. I did hear that toothpaste would work but I've never tried it as I always stuck with various grades of wet & dry and finishing off with some form of metal polish.
hmm, usually when its copper you dont want to leave it in water. but if its alu i dont think it makes to much of a difference.\ anyways, nice lapping you have.
Cu (II)(s) + 2H2O(l) -> 2Cu(OH)2(s) I'm a bit tired to work this out... but shouldn't copper like... not react with water? Edit: And we make pipes out of copper because it's unreactive. CuO is green too though, right?
i remember reading something here on bit-tech about using alchohol instead of water due to oxidation, but i dont remember where it was.... and i think this may be dirt, but it was taken out of ZeroHero's project log "Lian Li Clean Mod"
