I've got some kurust at home that I plan on using on a few bits of rust I have. There are 2 or 3 bits which are no bigger than 3mm diameter and one which is about 6mm or 7mm long. However I don't plan on sanding/priming/painting those bits until later on in the year. Can I apply kurust now to stop the bits from further rusting and leaving it on until I do the full repair later in a few months time?