Nail polish? You mean color the whole mech with Nail polish? umm, care to enlighten me a bit 
i havent heard of this tip before. maybe can share it here? 

i guess, there's only 1 way which is using ur design knife to slowly clean off the nips... u cant sand them unless u wan to scratch them or........ if u wan to sand them then u spray another color or clear coats

actually it's better to clear off nips and get a smooth surface before start spraying..

Some kind of double work, unless u r rich fella

btw, if doing this better do it with AB... spray can if u unable to control the pressure..
Sure many many tone of colour come out one..

Btw, i did this before and kena marah by sifu afterwards..

lao... btw, craft knife.. which type is recommended to buy? the 60degree or 30degree one...

aiyo i buy all the three types lor 30, 60 and 90 degree haha... hobby pen knife holder can switch the blade part without buying another handler de ma so don worry la cheap only la ...

well for those blades i gt 3 handles for every type myself cuz i very often switch between them de...

i use 30 for nip cutting cuz it have a longer blade cutting tip and it can cut nips more accurate compared to others...

i use 60 for scratching away the paint marker line for place which i don wan the paint to be at and make panel line drawing thinner on those unpaint parts and also cut nips sometimes... sometimes ...

i use 90(have very short blade cutting tip bout 3-4mm only) to cut decal after decal applied on those place which got seam lines which shall not be hidden away using putty(like freedom/strike freedoms' shoulder) or panel lines... it also can be use to make or deepens the panel lines so u can get ultra thin panel lines in some parts which have/dont have panel lines originally(own desire)

all of them are useful and u can get them for about RM12-13(Maped Creativ)... becareful cuz the blades rust easily if u touch it with bare hands so to clean the blades use tissue paper... if u rich get tamiya hobby knife as it wont rust but of cuz la cheapest i saw is about RM60-80 hehe ...

and by the way yamyinhao, dont use envelop knifes cus it isn designed to be use as a hobby knife as the knife is loose and cutting is never accurate at all ... get urself a Maped Creativ hobby knife at bookstore like popular or thai kwang...
.......and guys, to fix seam lines mr putty is best so far... putty the seam line then stick together both pieces then cut and sand the seams till smooth then straight surface once or twice(if u r very cho lo or very unlucky) then smooth liao then can paint ad la... no nid much work de la... see my MG freedom in modelling gallery... i din surface to check the seam lines also cuz mafan la btw in hurry also so juz putty then cut and sand till very smooth then straight paint ad without surfacer... easy and as good as those with surfacer to check for seam lines...
these are just my experience so good luck trying it:thumbs:

Im no expert but i'd say try both and see which one fits you fine a bit expensive method tho

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Added on June 11, 2008, 3:57 pm
actually, i've come across something similar like what you're using but it wasnt for painting if i remember correctly... it was for some other method in which i forgot. i wish i could find that link again and show you fellas.... forgot already.  i thought you were doing the same thing btw. in any case, i believe every modeller has their own way of doing things so chill bro
btw, yamyinhao... your wife not angry kah that you are "abusing" her nail polish kits?   

but thx for the input on nip marks.  I'd like to know more efficient & inexpensive ways without having to paint the whole thing. 

if the base color is similar with the paint color u wont notice scratch or anything one!

^paint without surfacer???
The paint wont chip off meh??? 
lol spray a layer of top coat after paint lor... don worry it doesn happens to me so far but with surfacer of cuz better lor compared to no surfacer... don purposely go scratch la... becareful and try not to play with it or change its' pose frequently lor...