Resin=Tar
I figure I will help you out. Resin is the trichomes off of a marijuana plant. Americans commonly call pipe tar "resin".Pipe tar contains alot of Cbd/Cbn's which are the cannaboids found in marijuana that give you the drowsy, couchlock feeling. It also contains ash, and little particles of marijuana/crystals. It is low in thc, and high in carcinogens(gives you cancer!)
I have cleaned many, many pipes, and worked with penty of iso hash. First off DO NOT scrape your pipe, if its metal it will leave metal shavings in the tar, and if its glass you risk breaking it. Here is how to get every single peice of tar from your pipe, and somewhat purify it.
Get 91%-99% Iso Alchohol, its cheep, relativly pure, and evaporates quickly and clean. You also need a pyrex pie plate that is 100% flat. You need a dish that your pipe fits in snug, a microwave, and a fan. You also need razor blades(2)
Step 1: Pour enough alchohol in your dish so your pipe will be covered in it. Heat the alchohol in the microwave untill it boils(about a minute) There is NO risk in doing this, ive done it 400+ times.
Place your pipe in the hot alchohol and move it around, in about 2 minutes all the resin from your pipe will dissolve into the alchohol. Take your pipe out, get any spots with a q-tip, and wash out with soapy water(Its now clean)
Strain the alchohol through a gold screen coffee filter(NOT the paper ones)
to get all the ash out,letting the alchohol pour Into the pie plate
Now you can skip to step 3, or clean it up with step 2.
Step 2:Take the alchohol and pour it in a glass jar with a lid. Make a small hole in the lid for venting(if you dont, it will explode). Pour in half as much hot water as you have alchohol. Now shake the fuck out of it with your finger over the hole,and make sure to let your finger off to let the pressure out.The water will hold all the bullshit, the alchohol will hold all of the thc/cbd/cbn's.
Now pour into a plastic bag, and hang up to let it settle. After the alchohol/water seperates poke a small hole in the bottom of the bag and let the alchohol drain off into your pie plate, make sure no water drips in, and throw the water away.
Step 3

lace the pie plate infront of a fan, and let it evaporate untill its basically dry, but is still a little wet. You want to scrape now because after it drys, its too sticky.Then scrape it into a pile with the razors and let it completely dry. It will dry to a orangish sticky tar.
I add 50% marijuana shake to it, mix as best I can with my razors, I then flatten it out , set on the pie plate, and slightly heat with a lighter to melt it and then mix it further. I then set infront of a fan to dry. After its dry scrape it up, form into a ball, and coat the outside with powdered marijuana, or flour.
This stuff smokes shitty, the first few hits in a bowl are good, but after that it melts through the hole, and turns hard. Some put a peice of a choreboy pad on the bottom of the bowl so it dosent melt through, I dont. Smoking in a paper is disasterous, but a few skittle size balls on a gram or 2 of shwag in a Blunt Shell works decently.
I DO NOT smoke Tar anymore, I messed around with it alot 4 or 5 years ago when weed wasent plentifull .The day after smoking Tar I always coughed up clear gellatanous flem with green to brown spots in them.
Step 2 is also used to clean up "soapbar" hash , Just do this extra step before following step 2. Dissolve the soapbar in 91%-99% alchohol.
So there ya have it, the best way to collect pipe tar, clean it up, and smoke it. Thanks,
Resin_King