In relation to colour-blending ..... it makes no difference whether wearing a topper or partial ...if it`s custom-made and you sent a hair sample, there should be no appreciable difference [but there sometimes can be a ` problem` ].......
ORWG -----You`ll find suppliers by searching on Google.... it`s best to try get this delivered by surface-delivery rather than air-freight, as low temperatures in aircraft cargo holds will damage this glue. You can spray ``Adjust-a-bond`` [an alcohol] onto glue and / or tapes ...it will only ` buy` you about a minute of time in which to position the system before it evaporates off...there are many ways of positioning a system...this take a lot of trial and error...it can be very tricky when you`re not used to it..... I find tapes easier and less time-consuming to work with......you need to set time aside if doing a glue attachment....irrespective of whether a glue is white [water-based] or acrylic, you must allow a minimum of 15 minutes or so, between coats /layers ....the glue MUST be allowed to cure ..... these are specialist glues and take up to 24 hours to fully cure, and it`s essential to apply them when you are sitting , resting, in a cool room as heat /sweat will affect their hold.
It`s easiest to sit the system on, position it, then mark little lines or dots with an eyebrow pencil around the front perimeter ....you can then apply your glue layers inside those marks......... it can be tricky to see the back area ...2 mirrors is the best way.... positioning has been covered in many threads ..... it takes patience and time /experience..... it`s generally best to bond the front hairline first and then ` fold` the system back onto the head / glued area.....don`t expect perfection initially ...it all takes a lot of time and patience....if hairs get stuck to glue, simply spray a little lace -release onto them and they`ll come free from it.... you might find it easier to use tape/s around the sides /back and have a glued area on the front ..... I`ve posted photos of how I apply my tapes ...just click my user-name and you`ll see all my threads/ posts ..there are also good tutorial videos on ``Youtube`` .....lots of aspects of wearing are covered, from styling /cutting-in, to attachments, and removal /cleaning ...it`s worth looking at those. You can [relatively] easily sit your system on,position it, then peel off the papers from the taped area/s, then attach /press it ` home` to the scalp...you can then fold the front area back onto the head and use a hair-clip to hold it back out of your way as you apply your glue layers to the front of your scalp.......when your layers have dried, you can unclip it and fold it forward/ down onto the glue......it`s VITAL to leave the glue ample time to go literally ` dry` .....NEVER EVER push lace down onto wet glue ....you`ll end up with a real disaster on your hands [ or head !]
Lace -release is exactly that ....it releases lace bases from tape/glue.... I apply mine from a dropper -tube such as is used for placing ` drops` into the ear /eye..you can get them in any pharmacy .....very cheap and very effective for delivering the liquid ` locally` to where it`s required. Get plenty of this product as you`ll be using lots of it and it`ll never go to waste! Glue -melter is another type of alcohol used for attacking residues on the lace and /or scalp .... I`ve found it a bit tedious to work with at times. ... you may need repeat applications before it begins to break it down .... I use it mainly on the lace if I get a residue there ...for the scalp, citrus-bassed solvents are great ....you can get C-22 or ` De-solv-it` ..... I believe Walmart sell those .....don`t use them repeatedly on lace as they can begin to discolour it or it gets an orange hue ....it`s very effective on the scalp -- spray it on, leave it a few minutes to ` work` then wipe the area with kitchen towel before shampooing the scalp as normal. I nor anyone else can tell you what will work well for you in terms of adhesive materials, and sadly, manufacturers don`t make ` sample size` bottles of glue and this can mean you shell out a lot of money on expensive glues only to find they don`t have the hold you need /want ..... it`s part of the initial learning -curve. Get in a selection of tape rolls and your ORWG and possibly an alternative glue .....you should get a system-specific shampoo and conditioner and a daily leave-in conditioner ---- again, there are many available and I don`t really want to endorse one over another .....just do a Google -search for Hair system shampoo and conditioner ......you`ll find what you want ..... I`d recommend a thinning-scissors too ...helpful for doing minor ` tweaking` at home......
You asked about using a toothbrush on the lace---- there should be no real need of that ...as long as you`ve allowed the Glue-melter time to soften /break it down, you should be able to wipe it off using something like a microfiber cloth or even strips of bubble-wrap...if you stay with a regular routine of removing your bond [before the glue /tape begins to break down into a messy goo] you shouldn`t really have too much of a ` messy` clean-up .......guys get tempted to put off doing a new bond because the present one is still nice and strong..... some of these adhesives can be fine one day and literally overnight go ` unstable` ..that`s when things can get ` messy` and take a lot of your time...keep to a regular routine.
I know there are a myriad of questions and `` what if`s `` running through your mind ....just deal with one thing at a time ...plan your template and have a look on Youtube as there are many really helpful tutorials there and it`ll remove much of the mystery for you.